Dibromodifluormethane
[建] 二溴二氟甲烷
🗣️ 情景例句
She won the first place in a speech contest.
她在演讲比赛中获得很第一名。
Do well is better than say well.
说得好不如做得好。
But the historian attempting to reconstruct the distant past is always faced with a difficult task.
但是，历史学家企图重现遥远的过去可是一项艰巨的任务，