Portable crane
[化] 轻便起重机
🧩 词语组成解析
crane
[kren]
n. 吊车，起重机;鹤;
vt.& vi. 伸长，探头;
vi. 迟疑，踌躇;
🗣️ 情景例句
I'm experienced in IBM-PC and Great Wall computers.
我熟悉IBM-PC和长城电脑。
Nice guy!
好家伙！
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。