Gravitational force
引力, 重力, 地心吸力
?? 詞語組成解析
gravitational
['gr?v?'tei??n?l]
adj. 萬有引力的，重力的;地心吸力的;
force
[f?:s]
n. 力;武力;（社會）勢力;魄力;
vt. 強迫;強行;促使，推動;強奸;
??? 情景例句
The carpet's worn out. Let's put in new wall-to-wall carpeting.
地毯已很破舊了， 我們需要裝一套新的。
To build a house
成家
The great cities have been built with no regard for us.
大城市的建設毫不關心我們。