当我进入房间时，我发现他在读书。

When I entered the room, I found him reading.

youdao

当我进入房间时，他向我点头打招呼。

He nodded to me in greeting when I went into the room.

youdao

当我进入房间时，发现他躺在那里睡着了。

When I came into the room, I found him lying there asleep.

youdao

当我进入房间，眼前是一堆乱七八糟的东西。

Inside the room a dreadful mess greeted us.

youdao

当我进入房间，眼前是一堆乱七八糟的东西。

Inside the room a dreadful mess greeted us.

youdao