Holothurioidea
[医]海参纲
🗣️ 情景例句
Attending school is compulsory in this country.
这国家衽的是义务教育。
I will be going to school in a few weeks from now.
我将在几个星期后上学去。
I'll have to ring you back, as I need to have a look at my diary and I haven't got it with me.
我得（等会儿）再给你回电话，因为我要先看看我的日记，而我没有把它带在身边。