近地表的地震频率可能高达一个月100次，但每年的平均值变化不大。

Near the surface earthquakes may run as high as 100 in a month, but the yearly average does not vary much.

youdao

远程控制的机器粉碎硫化物沉积物，然后通过升流管将其吸附到地表的容器上。

Remote-controlled machines smash the sulfide deposits, which are then hoovered up through a riser pipe to a vessel on the surface.

youdao

在地球上，移动的构造板块是一个主要的地质元素，对整个地表的动态变化至关重要，对吗？

Here on Earth, moving tectonic plates are a major geological element, just crucial for the whole surface dynamic, right?

youdao

Hal is behaving in exactly the way you would expect him to behave, or it to behave, if it felt fear.

哈尔准确地表现出你所期望他,或称为它,理应表现的行为方式,如果它确实感到恐惧的话

耶鲁公开课 - 死亡课程节选

And, seawater contains only 3.7% of the total magnesium present 7% in the Earth's crust.

而海水只含有,地表镁总量的,3。

麻省理工公开课 - 固态化学导论课程节选

This tells you exactly what you want.

它清楚地表明了你的目的

耶鲁公开课 - 基础物理课程节选