Your work is just not good enough.
你的工作真是不夠好。
50 should be enough to be going on with.
50英鎊該夠應付一時半會兒的了。
The system produced enough energy to heat several thousand homes.
系統產生的能量足以給幾千戶人家供暖。
You are probably well enough to take a little light exercise.
你恢復得不錯，大概可以做些輕微的運動了。
Would you be kind enough to close the window?
請把窗子關上好嗎？