If anything goes wrong, please keep calm.

如果出了什么事，请保持冷静。

youdao

If you are scalded, please keep calm at first.

如果你被烫伤了，首先请保持镇静。

youdao

When you heard the bad news, please keep calm.

当你听到不幸的消息时，请保持镇静。

youdao

Please keep calm.

请镇静一点。

youdao

Please keep calm.

请镇静一点。

youdao