Your work is just not good enough.
你的工作真是不够好。
50 should be enough to be going on with.
50英镑该够应付一时半会儿的了。
The system produced enough energy to heat several thousand homes.
系统产生的能量足以给几千户人家供暖。
You are probably well enough to take a little light exercise.
你恢复得不错，大概可以做些轻微的运动了。
Would you be kind enough to close the window?
请把窗子关上好吗？