攀登者们极其谨慎，在登顶前检查了每一件装备。

Exercised great ___caution, the climbers checked every piece of equipment before the ascent.

我会带着极大的审慎态度看待他说的任何话。

I would treat anything he says with extreme ___caution.

操作重型机械时必须格外小心。

Extreme ___caution must be exercised when operating heavy machinery.