Gravics
重力場學, 引力場理論
??? 情景例句
Yeah. What's the bet?
好啊， 賭什么？
Many ants kill the horse.
蟻多可殺馬。
Fortunately, however, ancient men made tools of stone, especially flint,
然而， 幸運的是，遠古人用石頭制作了工具，特別是用燧石，