It is important never to overdo new exercises
重要的是，不要過度練習新學的動作。
You should work hard, but don't overdo it and make yourself ill.
你應努力工作，但不可過度把自己累病了。
The meat was ─ how shall I put it? ─ a little overdone.
這肉嘛，怎么說呢，做得稍微老了點兒。
Use illustrations where appropriate but don't overdo it.
要適當地使用插圖，但不宜過多。
I overdid it in the gym and hurt my back.
我在健身房練得過火了，結果弄傷了背。