Subsurface
a. 表面下的
✅ 同义词
🗣️ 情景例句
to schedule one hour a week--to start with.
安排一星期一个小时。
He likes playing the harmonica.
他喜欢吹口琴。
as by falling into inaccessible caves, or into an ice crevasse, like the Siberian mammoths,
如掉进难以到达的洞穴，或掉进冰河裂缝里，或者像西伯利亚长毛象那样掉进冰窟中，