I don't know if he signals, Mike.

我不知道他是否发出信号，迈克。

We could come along down if you signalled.

如果你发出信号，我们就可以下来。

Suddenly the other girl began to wink frantically with both eyes, as if to signal that she was really in there on the other side.

突然，另一个女孩开始用双眼疯狂地眨眼，好像在暗示她真的在另一边。

Some trains that currently run at 125mph could go faster if signals were upgraded—even if unveiling a new signal box might appeal less to politicians than inaugurating a futuristic new service.

如果信号升级，一些当前时速在125英里的火车可以跑的更快－－虽然推出一个新的信号盒对政府官员的吸引力，比开创一个前瞻性的新服务小。