Black-billed
[医]黑喙
🧩 词语组成解析
black
[blæk]
adj. 黑（色）的;黑色人种的;黑暗的;不加牛奶的;
n. 黑色;黑人;黑颜料;黑暗;
v. 使变黑;抵制;拒绝;使变黑暗;
vt. 安排（bill的过去式与过去分词形式）
🗣️ 情景例句
I hear you
知道了。
I asked him to do it for me, but he wouldn't.
我请他帮我做，但是他不肯。
and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.
测出回声间隔的时间，便可算出该处海洋的深度。