Polychlorparaffin
多氯化石蜡
🗣️ 情景例句
In addition, it's great exercise too, since we do a lot of hiking.
还有，那也是个好的运动，因为我们要长距离徒步旅行。
Which one is more expensive?
哪一个是比较贵的？
I had just lost $50 and I felt very upset.
我刚刚丢了50英镑，感到非常烦恼。