The fact that he didn't say 'no' immediately is a good sign.

他没有马上拒绝，这是好征兆。

《牛津词典》

In fact, it is a good sign.

实际上，这是一个好信号。

youdao

That must be a good sign.

这无疑是一个不错的信号。

youdao

"It's set to take over from North America in absolute terms of movement and I think that's a good sign as well that intra-Asia, the demand is definitely coming back."

VOA: standard.2010.02.04

And if any of you here are nodding in agreement at these sentiments, that's not such a good sign.

如果在座有同学,点头同意这些人的观点，这可不是一个好迹象。

耶鲁公开课 - 心理学导论课程节选

It's always good when we're looking for a wavelength that our answer is in a unit of length, that's a good sign already.

当我们计算波长时,如果答案是一个长度单位，那就是一个好的迹象。

麻省理工公开课 - 化学原理课程节选

It is a good sign to see the revolving credit numbers continue to drop.

FORBES: Credit Card Debt Continues to Fall

The chart shows a pattern of lower highs (line a), which is not a good sign.

FORBES: The Week Ahead: Put The Odds In Your Favor Now

This is a good sign just so long as their industry beats consensus numbers.

FORBES: Market Trends: American Airlines: Buy it, don't fly it