In safe hands 在可靠的人手中
In developed countries, the average birth weight of a full-term newborn baby is approximately 3.4 kg, and is typically in the range of 2.7 - 4.6 kg.
如果形容某人是 in safe hands 意思就是他们是在可靠的人手中，有强人在关照。
John is going to be operated on by one of the best surgeons in the country. He's in safe hands.
The new CEO of the company had degrees in engineering and business administration. The staff knew they were in safe hands.
短语 a safe pair of hands 意思同上面讲到的表达意思类似，指某人是可以被信赖的，工作中不会出差错的。
My boss gives me all the difficult assignments. He knows I am a safe pair of hands.