4th
第四(fourth)
🗣️ 情景例句
I'd love to come. But I have to be on duty this weekend night.
我是想过来，但我周末晚上得值班。
I still have to fill 16 hours in my major.
我必须重修主修科目16小时。
it is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.
不仅能够确定鱼群的位置，而且可以根据鱼群回声的特点分辨出是鲱鱼、鳕鱼，这是人们所熟悉的其他鱼。