Reverse-gear
[化] 逆轉裝置
?? 詞語組成解析
reverse
[r?'v?s]
vt.& vi. （使）反轉;（使）顛倒;掉換，交換;[法]撤消，推翻;
vi. 倒退;[橋牌]逆叫;
adj. 反面的;顛倒的;倒開的;[生]倒卷的;
n. 倒轉，反向;[機]回動;倒退;失敗;
re向后，相反+verse轉→反轉，顛倒
gear
[ɡ?r]
n. 齒輪;排擋;傳動裝置;衣服 ;
vi. 接上;調和;
vt. 使適應;裝上齒輪;用齒輪連接;
??? 情景例句
Nonsense! How can you say that and keep a straight face?
胡說八道！你怎么能不動聲色說那些話呢？
I'll be back in 5 days.
我五天之后回來。
This time it was the postman and he wanted me to sign for a registered letter!
這次是郵遞員，他要我簽收一封掛號信！