DICT.TW Dictionary Taiwan

 at the bottom
 根本上,實質上,實際上

 Bot·tom n.
 1. The lowest part of anything; the foot; as, the bottom of a tree or well; the bottom of a hill, a lane, or a page.
    Or dive into the bottom of the deep.   --Shak.
 2. The part of anything which is beneath the contents and supports them, as the part of a chair on which a person sits, the circular base or lower head of a cask or tub, or the plank floor of a ship's hold; the under surface.
    Barrels with the bottom knocked out.   --Macaulay.
    No two chairs were alike; such high backs and low backs and leather bottoms and worsted bottoms.   --W. Irving.
 3. That upon which anything rests or is founded, in a literal or a figurative sense; foundation; groundwork.
 4. The bed of a body of water, as of a river, lake, sea.
 5. The fundament; the buttocks.
 6. An abyss. [Obs.]
 7. Low land formed by alluvial deposits along a river; low-lying ground; a dale; a valley. “The bottoms and the high grounds.”
 8. Naut. The part of a ship which is ordinarily under water; hence, the vessel itself; a ship.
    My ventures are not in one bottom trusted.   --Shak.
 Not to sell the teas, but to return them to London in the
 same bottoms in which they were shipped.   --Bancroft.
 Full bottom, a hull of such shape as permits carrying a large amount of merchandise.
 9. Power of endurance; as, a horse of a good bottom.
 10. Dregs or grounds; lees; sediment.
 At bottom, At the bottom, at the foundation or basis; in reality. “He was at the bottom a good man.” --J. F. Cooper.
 To be at the bottom of, to be the cause or originator of; to be the source of. [Usually in an opprobrious sense.] --J. H. Newman.
    He was at the bottom of many excellent counsels.   --Addison.
 To go to the bottom, to sink; esp. to be wrecked.
 To touch bottom, to reach the lowest point; to find something on which to rest.