It is not always clear that eating something as harmless as wheat can be bad for a person's health.

VOA: special.2010.06.15

Socrates is not harmless because of his own professed ability to attract followers, a few today, a few more tomorrow.

苏格拉底并非无害,因为他擅长吸引信徒的能耐,今天几个，明天再几个。

耶鲁公开课 - 政治哲学导论课程节选

The Athenians refuse to tolerate Socrates because they know he is not harmless, that he poses a challenge, a fundamental challenge to their way of life and all that they hold to be noble and worthwhile.

雅典人拒绝容忍苏格拉底,因为他们明白他并非无害，他公然挑衅，社会本质的生活方式,及他们视为崇高及值得的观念。

耶鲁公开课 - 政治哲学导论课程节选

So, I said to myself, it would be a simple, harmless act to help him, as much as I could.

VOA: special.2009.01.03

To some people,they are nothing more than a harmless treat or a guilty pleasure to enjoy from time to time.

VOA: special.2010.04.12

"Many people underestimate the health risks of their own cigarette consumption, thinking that a few cigarettes here and there, a few cigarettes every day,are harmless.

VOA: special.2009.06.03

Half received the vaccine. The other half received a placebo, or harmless substance.

VOA: special.2009.10.13

It was only a placebo, a harmless substance.

VOA: special.2009.10.20

All of the men say they never intended to bring down any planes, but rather they wanted to unleash a series of harmless stunt explosions on famous landmarks here to in their words, "expose the failings of Western foreign policy."

VOA: standard.2009.09.07