Perthiocarbonate
过硫碳酸盐
🗣️ 情景例句
That sounds like a good idea.
似乎是个好主意。
These shoes are worn-out.They've lasted a long time.
这些鞋子旧了。已经用了很长时间了。
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。