Difluoroethylene
二氟乙烯
🗣️ 情景例句
It is pleasant to jog in the early morning.
清晨慢跑很舒畅。
Nothing is more precious than time.
世上最宝贵的莫过于光阴。
punctuated by textbooks----those purchasable wells of wisdom----
并以教科书-那些可以买到的智慧源泉-予以强化，