Scientists have devised methods to trap vapor in bottles so they can study its makeup.

科学家用各种方法将蒸汽收集别瓶子里，以便研究它的成分。

youdao

Scientists have devised methods to trap vapor in bottles so they can study its makeup.

科学家用各种方法将蒸汽收集别瓶子里，以便研究它的成分。

youdao