The problem of the figure of the Earth is essentially a problem of equilibrium under the joint action of gravitation and rotation.
地球形狀的問題本質(zhì)上是引力和旋轉(zhuǎn)共同作用下的平衡問題。
I will continue to work hard and live up to everyone's expectations.
解釋：要緊緊抓住時(shí)機(jī)不能錯(cuò)過，錯(cuò)過了也不能延誤太久。
我的名字叫尤塞恩·博爾特，我不認(rèn)為有什么極限。
I like to tell a story and not explain it. I like to leave it open-ended.