all of a sudden suddenly的意思|示意

All of a sudden, a burst of Yin breeze once blows, the flame on the night star hand suddenly got dark.

忽然之间，一阵阴风吹过，夜星手上的火苗忽然变暗。

I do not know how it is, and suddenly happy like a child, all of a sudden sorrow was like the Yuan Fu.

我也不知道自己这是怎么了，忽然开心的像个孩子，忽然忧伤得有如怨妇。

Such as setting all of a sudden do the 50 specimens, but sometimes suddenly stops automatically.

比如设置一下子做50个标本，但是有时候会突然之间自动停止。