The front must fit into the opening like a plug, with no light or gaps visible.
前板必须像栓塞一样与开口紧密结合，不透光不见缝。
Usually they stayed awake three to four hours past sunset, with no light exposure other than the faint glow of a small fire that would keep animals away and provide a bit of warmth in the winter.
通常，他们在日落后三到四个小时里仍然清醒着，而且除了用以驱赶野生动物并在冬天聊以取暖的微弱火光之外，他们别无其他光源。
A portrait looks lifeless with no light and shade.
没有明暗色调的画像看上去是没有生气的。
No electricity, using oil lights, this is the only family with no light we have ever visited.
家里不通电，用的是煤油灯，这也是我们走访过的唯一一家不通电的。
With no light, he had to use his sense of feeling to find the flashlight in the drawer.
没有灯，他只能依靠触觉来找抽屉里的手电筒。
With no light, he had to use his sense of feeling to find the flashlight in the drawer.
没有灯，他只能依靠触觉来找抽屉里的手电筒。
应用推荐