A sound made by tapping on the hull of a ship will be reflected from the sea bottom,
敲打船体所发了的声音会从海底传回来，
新概念英语第四册
Lesson 7 Bats
📚 句中词汇解析
从本句中提取的重要词汇
n. 声音，声响;音调，声调;声波;嘈杂声;
vi. 响，发声;听起来，好像;回响;[音乐]乐器等被奏响;
vt. 使出声，使发声;清楚地发出;宣布，发表;颂扬;
adj. 健全的;合理的;完好的，无损的;明智的;
adv. 彻底地，充分地;
"I can't bear the sound of chalk scraping on a blackboard."
我受不了粉笔在黑板上摩擦时发出的刺耳声音.
近义：plumb, probe, study, fathom, holler, scream
反义：imperfect, blemished, defective, dud, faulty, flawed
adj. …制的;（人工）做成的，拼成的;虚构的;保证成功的;
v. 使(make的过去式和过去分词);
"He made it absolutely clear."
他把此事讲得一清二楚。
近义：manufactured, produced, done, fabricated, artificial, manmade
n. 果皮，外皮;[航海]船壳，船体;外壳;
vt. 去（谷物、豆等的）壳;
"The outer surface of ship's hull is very hard."
船体的外表面非常坚硬.
近义：husk, pare, peel, shell, shuck, skin
n. 船;<口>宇宙飞船;（舰船上的）全体船员;运气;
vt.& vi. 运送;
vt. 把…装上船;装好（船具）;上市;使乘船;
vi. 在船上工作;乘船旅行;当船员;
💡 ship（船）-sheep（绵羊）:巡洋舰
"The ship was given the all-clear to sail."
这艘船获得了航行许可。
近义：mail, remit, send, transfer, issue, consign
n. 底部;末端;臀部;尽头;
adj. 底部的;
vt. 装底;测量深浅;查明真相;
vi. 到达底部;建立基础;
"The bottom of the bucket has worn through after all this time."
经过这么长时间,这只桶的底部终于磨穿了.
近义：arse, booty, behind, butt, breech, can
反义：head, height, apex, hilltop, peak, pinnacle