seeing conjunction because; since 因为;鉴于 seeing that I'm awake,I might as well come with you. 既然我已经醒了,我还是到你那里来. noun [mass noun]the action of seeing someone or something 看见 ■(Astronomy)the quality of observed images as determined by atmospheric conditions. (天文)(影响天象观测质量的)宁静度,视宁度