naturally

certainly, naturally, of course, surely

这些副词或词组均有“肯定地，当然”之意。
certainly: 强调有把握，深信不疑。
naturally: 指自然而然，毫无造作或天生如此。
of course: 指毫无疑问，自然如此。可与certainly和naturally换用。
surely: 表一种必然的可能性，也可表示信心或不轻信。强调主观判断。

副词 naturally:

1. as might be expected
   同义词：of course, course
2. through inherent nature
   同义词：by nature
3. according to nature; by natural means; without artificial help
4. in a natural or normal manner

1. It is better to sleep naturally than taking medicine.
   最好是不服用药物自然入睡。
2. Naturally, as a beginner I'm not a very good driver yet.
   我初学开车，当然开不好了。
3. `Did you answer her letter?' `Naturally!'
   ｀你给她回信了吗?＇｀当然了!＇
4. She speaks and behaves naturally.
   她言谈举止很自然。
5. Her hair curls naturally.
   她天生鬈发。
6. He's such a good athlete that most sports come naturally to him.
   他擅长运动，多数运动项目对他来说都轻而易举。
7. Plants grow naturally in such a good climate.
   在这麽好的气候条件下，植物可以自然生长。
8. Try to act naturally, even if you're tense.
   即使紧张也不要做作。