介绍:
Day40.
Studies of the gravity field of the Earth indicate that its crust and mantle yield when unusual weight is placed on them.
对地球引力的研究表明，在不寻常的负荷之下地壳和地幔会发生位移。
the gravity field of the earth 地球引力
美 [ˈɡrævɪti] n.重力;万有引力
There was an appealing gravity to everything she said.
她说的每句话都带着一种庄严，很能吸引人。
crust 美 [krʌst] n.地壳;外壳;面包皮;
Earthquakes leave scars in the earth's crust.
地震会在地壳上留下裂痕。
mantle 美 [ˈmæntl:] n. 地幔， 覆盖物
Internally the earth consists of two parts, a core and a mantle.
地球的内部由两部分组成：地核和地幔。
Yield 美 [jild] v. 放弃，屈服;生利;退让
He may yield control
他可能会放弃控制权。
