at length
 最後,終於;詳細地,充分地
 Length n.
 1. The longest, or longer, dimension of any object, in distinction from breadth or width; extent of anything from end to end; the longest line which can be drawn through a body, parallel to its sides; as, the length of a church, or of a ship; the length of a rope or line.
 2. A portion of space or of time considered as measured by its length; -- often in the plural.
    Large lengths of seas and shores.   --Shak.
    The future but a length behind the past.   --Dryden.
 3. The quality or state of being long, in space or time; extent; duration; as, some sea birds are remarkable for the length of their wings; he was tired by the length of the sermon, and the length of his walk.
 4. A single piece or subdivision of a series, or of a number of long pieces which may be connected together; as, a length of pipe; a length of fence.
 5. Detail or amplification; unfolding; continuance as, to pursue a subject to a great length.
 May Heaven, great monarch, still augment your bliss
 With length of days, and every day like this.   --Dryden.
 6. Distance. [Obs.]
    He had marched to the length of Exeter.   --Clarendon.
 At length. (a) At or in the full extent; without abbreviation; as, let the name be inserted at length. (b) At the end or conclusion; after a long period. See Syn. of At last, under Last.
 At arm's length. See under Arm.
 At prep.  Primarily, this word expresses the relations of presence, nearness in place or time, or direction toward; as, at the ninth hour; at the house; to aim at a mark. It is less definite than in or on; at the house may be in or near the house. From this original import are derived all the various uses of at.  It expresses: -
 1. A relation of proximity to, or of presence in or on, something; as, at the door; at your shop; at home; at school; at hand; at sea and on land.
 2. The relation of some state or condition; as, at war; at peace; at ease; at your service; at fault; at liberty; at risk; at disadvantage.
 3. The relation of some employment or action; occupied with; as, at engraving; at husbandry; at play; at work; at meat (eating); except at puns.
 4. The relation of a point or position in a series, or of degree, rate, or value; as, with the thermometer at 80°; goods sold at a cheap price; a country estimated at 10,000 square miles; life is short at the longest.
 5. The relations of time, age, or order; as, at ten o'clock; at twenty-one; at once; at first.
 6. The relations of source, occasion, reason, consequence, or effect; as, at the sight; at this news; merry at anything; at this declaration; at his command; to demand, require, receive, deserve, endure at your hands.
 7. Relation of direction toward an object or end; as, look at it; to point at one; to aim at a mark; to throw, strike, shoot, wink, mock, laugh at any one.
 At all, At home, At large, At last, At length, At once, etc. See under All, Home, Large, Last (phrase and syn.), Length, Once, etc.
 At it, busily or actively engaged.
 At least. See Least and However.
 At one. See At one, in the Vocabulary.
 Syn: -- In, At.
 Usage: When reference to the interior of any place is made prominent in is used. It is used before the names of countries and cities (esp. large cities); as, we live in America, in New York, in the South. At is commonly employed before names of houses, institutions, villages, and small places; as, Milton was educated at Christ's College; money taken in at the Customhouse; I saw him at the jeweler's; we live at Beachville. At may be used before the name of a city when it is regarded as a mere point of locality. “An English king was crowned at Paris.” --Macaulay. “Jean Jacques Rousseau was born at Geneva, June, 28, 1712.” --J. Morley. In regard to time, we say at the hour, on the day, in the year; as, at 9 o'clock, on the morning of July 5th, in the year 1775.
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 at length
      adv 1: after a long period of time or an especially long delay; "at
             length they arrived" [syn: finally, eventually]
      2: in a lengthy or prolix manner; "the argument went on
         lengthily"; "she talked at length about the problem" [syn:
          lengthily]