One grunt might be an accident, but in an emergency you need to communicate quickly, so don't make your safe sound anything complicated.

咕哝一声代表可能要出问题了。有时候会发生紧急情况，你需要尽快交流，不要让安全声音过于复杂。

youdao

They turned up safe and sound.

他们安然无恙地出现了。

《牛津词典》

We arrived home safe and sound.

我们安然无恙地到了家。

《牛津词典》

The ship is anchor'd safe and sound, its voyage closed and done, From fearful trip the victor ship comes in with object won;

VOA: special.2009.12.31

These names sound safe -High Grade, Enhanced -but they both collapsed and became leveraged fund.

这俩名字听着多有安全感,高级,增强,但两者最后都崩溃了,变成了杠杆资金

耶鲁公开课 - 金融市场课程节选

Yet the sound of the engine made everything seem warm and safe.

VOA: special.2009.03.18

Therefore, forecasting future earnings growth, bought at sound valuations, is the key to safe, sound and profitable performance.

FORBES: Looking to the Future

You can sleep soundly knowing that a parcel of your net worth is safe and sound.

FORBES: Soros Vs. Levy Vs. Buffett

If you really must freak out, do so when we're safe and sound on the ground.

CNN: Air rage: Passengers 'quicker to snap'