Definition
To be in excellent health or in very good condition.
健全如钟
Despite being in his eighties, he's still as sound as a bell.
尽管已经八十多岁了，他的身体依然非常健康。
After a few days of rest, she is now as sound as a bell.
休息了几天后，她现在的身体状况非常好。
The old car's engine is as sound as a bell after the thorough overhaul.
经过彻底的检修后，这辆旧车的引擎状况极佳。