Maintain visual contact.

保持视觉联络。

youdao

Fire party members maintain visual contact with lamps.

救火队员之间用灯光保持视觉联络。

youdao

At first smile and maintain visual contact with the interlocutor.

首先，对你的谈话对象保持微笑，并与他保持眼神的交流。

youdao

Rescue workers said they had not had any visual contact with Mr Torres Lopez, but that he had responded to noise signals they had made.

BBC: Chile slow search for miner trapped 100m underground

As the aircraft ran out of altitude and options, gliding with a broken windshield and no engine power, the crew made visual contact with the ground and spotted a straight section of a rural highway below.

FORBES: Could You Land A Large Plane On An Interstate Highway?

Staff Sgt LORENTO SPITERI, Armed Forces of Malta: Once we do make visual contact with the vessel we'll ID the number of personnel on board, and we'll usually immediately commence a search for about 25 to 40 square miles.

BBC: Last Updated: Wednesday, 16 January 2008, 12:19 GMT