Such creatures have rarely been seen alive by man as they live at a depth of six hundred feet.
人们很少能看到活着的这类动物，因为它们生活在600英尺深的水下。
新概念英语第二册
Lesson 82 Monster or fish
📚 句中词汇解析
从本句中提取的重要词汇
adv. 很少地;罕有地;极精彩地;珍奇地，绝佳地;
💡 rare稀少的 + ly...的 → ad.很少，难得
"Biology rarely starts over."
生物难得重新开始。
近义：infrequently, occasionally, seldom, sometimes, oddly, peculiarly
反义：manyfold, oft, often, oftentimes, repeatedly, usually
adj. 活着的;活泼的;有生气的;敏感的;
💡 a在…，…的+live活→活的
"We don't know whether he's alive or dead."
我们不知道他是死是活。
近义：live, living, quickened, surviving, animated, passionate
反义：inert, insentient, lifeless, spiritless, unanimated, unfeeling
n. 深度;深处，深海;深奥，奥妙;进深;
💡 dep=deep深的+th抽象名词 →深度
"What's the depth of the water here?"
这儿的水有多深？
近义：profundity, deepness, inwardness, profoundness
vi. 生存;居住;生活，过活;在生活中得到享受;
vt. 经历;度过;
"We cannot live without water."
没有水我们不能生存。
近义：last, reside, be, sojourn, subsist, dwell
反义：perish, vanish, part, croak, decease, depart
v. 看见( see的过去分词 );观看;领会;考虑;
"The aforementioned person was seen acting suspiciously."
有人看见前面提到的那个人行动可疑。