The eye controlled by the sleeping hemisphere keeps shut, while the wakeful hemisphere's eye stays open and alert.
由睡眠大脑半球控制的眼睛保持关闭，而清醒大脑半球的眼睛保持睁开和警觉。
This can help reduce acid reflux when sleeping, as gravity keeps the acid in the stomach.
因为重力可以让胃酸流回胃里，所以这样有助于在睡觉时防止胃酸倒流。
This can help reduce acid reflux when sleeping, as gravity keeps the acid in the stomach.
这样利用重力的原理便可以减少胃酸倒流。
Sleeping Coat is made from lightweight waterproof fabric that keeps the body warm and can be inflated to create a comfortable sleeping bag.
这款睡袋由超轻防水纤维制成，能保暖，也能充气使用更舒适。
A man in Australia who keeps bees as a hobby came home from a night at the pub and decided that it was a good time to move a beehive because it was night and the bees should be sleeping.
澳洲一名以养蜂为嗜好的男子，一天晚上从酒吧回来，觉得当时是个搬动蜂窝的好时机，因为当时是晚上，蜜蜂应该都在睡觉。
A man in Australia who keeps bees as a hobby came home from a night at the pub and decided that it was a good time to move a beehive because it was night and the bees should be sleeping.
澳洲一名以养蜂为嗜好的男子，一天晚上从酒吧回来，觉得当时是个搬动蜂窝的好时机，因为当时是晚上，蜜蜂应该都在睡觉。
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