be sure to do

Be sure to do that.

一定呦!

Just be sure not to do it under time pressure;

确保别在有时间压力的情况下操作；

Be sure to do the sowing in good time.

确保适时播种.

If you are going to throw up, be sure to do it in the sick bag.

如果您想吐的话, 一定要吐到呕吐袋里.

Please do be patient — I'm sure you want to have your two penn'orth.

请务必耐心些——我知道大家一定想要发表个人意见。

Make sure you speak your mind and be sure to do so with conviction.

确定你说你的思想而且确定用信念这麽做.

Know him! to be sure I do. Why, he is down here every year.

认识他！当然认识。噢，他每年都到这里来。

Therefore, when using the Internet, be sure to do it in moderation.

所以在上网时, 还是要有所节制才好.

I found out that I have no artistic ability at all, and now I know for sure that I do not want to be an artist. However, the class was one of my favorites that year.

我发现自己根本没有艺术能力,现在我确定不想成为一名艺术家。然而,这门课是我那一年最喜欢的课之一。