Alternativeness
两者择一
🗣️ 情景例句
What subject did you major in university?
你在大学主修的科目是什么？
Life without a friend is death without a witness.
在世无朋友，死后无证人。
At a special swimming pool in Los Angeles, children become expert at holding their breath under water even before they can walk.
在洛杉矶的一个特设的游泳池里，孩子们甚至在还没有学会走路时就已经能熟练地在水下屏住呼吸了。