Incidentally, we also learned our own responsiveness to certain signals.

"I begin to think so, particularly if you have not forgotten a certain signal."

An unusual feature is that the partners are allowed to make certain limited signals to each other during play.

During the actual card play, the partners are permitted to make certain signals to each other.

The precise time is given immediately upon connection, rather than after a certain signal.

He gave me a certain signal, and I took my hand out of my pocket.

It sound like the body knows where certain signals go and can repair accordingly.

It goes like this: we could easily train a parrot to respond to a certain signal with the words 'Going to the bank'.

They agreed on certain signals, then started through the rest of the furze checking their time and direction.

There are also certain special signals given for unique incidents.