即使面对批评，他依然保持冷静。

He remained ___calm even when facing criticism.

暴风雨过后，湖面变得异常平静。

After the storm, the lake became unusually ___calm.

母亲轻轻拍着婴儿的背，试图让他平静下来。

The mother gently patted the baby's back to ___calm him down.

湖面恢复了平静，像一面镜子。

The lake returned to ___calm, mirror-like in its stillness.