Acupuncture treatment is gentle, painless, and, invariably, most relaxing.

针灸疗法柔和，无痛，而且总是令人非常放松。

The operation itself is a brief, painless procedure.

手术本身耗时短且没有痛苦。

...a quick and painless death.

没有痛苦的快速死亡

House-hunting is in fact relatively painless in this region.

在这个地区找房子事实上相对比较容易。

There are no easy or painless solutions to the nation's economic ills.

这个国家的经济弊病没有轻松便捷的解决办法。