🧩 词语组成解析
pine
[pain]
n. 松树;松木;凤梨，菠萝;
vi. 憔悴;痛苦;渴望;
vt. 为…悲哀;哀悼;消瘦;渴望，渴慕;
adj. 似松的;松木的;
🗣️ 情景例句
Do you have any special hobbies?
你有什么特别的爱好吗？
I'll have studied English for four years next March.
到明年三月，我就学了四年的英语了。[将来完成时，表示将完成…，会做完…]
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。