有人担心他脸皮太薄，会经受不住总统选举的考验。

Some fear he is too thin-skinned to survive a presidential campaign.

《柯林斯英汉双解大词典》

有人担心这一系列的事情可能会重新引发两国之间的敌意。

There are fears that the series could rekindle animosity between the two countries.

《柯林斯英汉双解大词典》

有人担心去年的罢工或许会重演。

There were fears that there might be a repeat of last year's campaign of strikes.

《柯林斯英汉双解大词典》

So, I don't even have to worry because you're not writing this down, so I can just fix it when I post the notes and no one will ever know, except that this is not OpenCourseWare.

所以我甚至不用担心,因为你们不会把这个写下来，所以我可以在我给出讲义的时候再修改,而且不会有人知道，但除非这不是公开课。

麻省理工公开课 - 化学原理课程节选

They are kept track of very closely, but because there's still smallpox that exists on the planet, there is some concern that that could be obtained and used to develop a weapon.

并且科学家们仔细记录病毒的使用情况,但因为这星球上仍存在天花,就会有人担心,某些人会获得天花病毒,并将其制成武器

耶鲁公开课 - 生物医学工程探索课程节选