1·They sleep by day and hunt by night.
他们白天睡觉，夜晚捕猎。
—— 《牛津词典》
2·By day a woman could safely walk the streets.
白天，妇女可以安全地在街上走。
—— 《柯林斯英汉双解大词典》
3·By day he worked downtown for American Standard.
白天，他在市中心为美国标准公司工作。
—— 《柯林斯英汉双解大词典》
4·I see better at night than by day.
我在晚上比在白天看得清楚。
5·Our son grew day by day.
我们的儿子一天一天长大了。
6·The sun shines by day, and the moon shines by night.
太阳在白天光芒万丈，月亮在夜晚明亮；
7·Deep-sea fish and whales have little or no light by day or by night.
深海鱼类和鲸鱼在白天或晚上都几乎不会接触光线。
8·By day he and all his court were lions, but in the evening they took their right forms again.
在白天，他和他的朝臣们都变成了狮子，但是到了夜晚，他们又会变回原来的样子。
9·They flutter through our dreams at night, they fly with us in our wheelings and circlings by day.
它们在夜里拍着翅膀，飞过我们的梦，在白天，它们和我们一起在天上盘旋。
10·Aamir Khan set a goal to himself day by day and the minute he made it, he fell down on the ground and could hardly stand up.
阿米尔·汗每天都给自己设定一个目标，就在他实现目标的那一刻，他摔倒在地，几乎站不起来。