收到指令后，他用无线电回复了“收到”。

After receiving the order, he replied '___Roger' over the radio.

当我问他是否准备好了时，他简单地回了一句'收到'。

When I asked if he was ready, he simply replied '___Roger'.

罗杰是我见过最友善的老师。

___Roger is the kindest teacher I've ever met.