Dicyanobutylene
二氰基丁烯
🗣️ 情景例句
why you have so many problems with math.
为什么你在数学方面有那么多问题。
You really did it this time!
这下你可糟了！
but although our faith in many of the things in which our forefathers fervently believed has weakened,
可是虽然我们对我们祖先笃信的许多事物已不太相信，