They seem to be on good terms but actually they always speak ill of each other

他们看起来好像关系不错,但是背后经常互相诽谤.

youdao

It's our first time to visit our grandparents. Mother wants us to be on good behavior.

这是我们第一次去爷爷奶奶家，妈妈要我们守规矩。

youdao

On balance, biotechnology should be good news for developing countries.

总的来说，生物技术对发展中国家来说应该是好消息。

《柯林斯英汉双解大词典》

And there may be another explanation: pressure from parents to get a good return on the family's investment.

VOA: special.2009.03.12

The Earth seems to be a pretty good inertial system, because on the ground, you leave something, it stays there.

地球看上去是个不错的惯性系,因为什么东西放在地上,都会保持静止

耶鲁公开课 - 基础物理课程节选

Notice that on the modest view, if we ask ourselves, ? would it have been good to be immortal?

在保守价值容器理论的前提下，如果我们问自己，永生是否是好事？

耶鲁公开课 - 死亡课程节选

If he is busy planning the next attack, American and British spooks had better be on good terms.

ECONOMIST: Fighting terrorism

When we part I would like it to be on good terms.

BBC: CHOOSE A SPORT

Indeed, for Pyongyang to benefit from an export-oriented policy, it would have to follow international standards and be on good terms with Washington.

CNN: Kim Jong Il's New Direction