🧩 词语组成解析
a. 软甲亚纲的
crustacean
[krʌs'teiʃjən]
n. 甲壳纲动物（如蟹、龙虾）;
adj. 甲壳纲的;
🗣️ 情景例句
I plan to leave the present job in order to be able to get into the advertising business.
我想离开目前的工作是为了进入广告业务以寻求发展。
It's already in production, so you can expect it in stores before the end of the month.
产品已投产了，所以月底前你可以获得。
Summer comes after spring. It is the hottest season.
春天之后是夏天。夏天是最热的季节。