形成: form; take shape; shape; formation; production; morph-; morpho-; plasto-; -plasia; -fy 短语和例子良好习惯的形成 the formation of good habits; 性格的形成 the formation of character; 云是悬在空气中的水滴形成的。 clouds ar
齿轮: gear [rack; toothed] wheel; (toothed) gear; wheel gear 短语和例子伞齿轮 bevel gear; 斜齿轮 helical gear; 正齿轮 spur gear; 搭上齿轮 get [put; throw] into gear; 齿轮脱开 out of gear; 这个大齿轮带动小齿轮使滚筒旋转。 this large
