adj. refluent ; contranatant
adv. upstream
这样做不仅能避免体重额外增加，还能降低食道胃酸逆流的风险和罹患其他加重睡眠问题的消化系疾病的可能。
Not only could it help prevent extra weight gain, it can also lower the risk of gastroesophageal reflux and other digestive problems that may compound sleep problems.
例如，在桥梁的建造中，罗马人发现如果逆流的桥梁支撑部分是“V”型的，尖冲着水流，那么支撑部分会存留更长时间。
In bridge building, for example, the Romans discovered that if the upstream bridge supports were shaped as a "vee" and pointed into the current, they would survive longer.
当然并不只是棱皮龟有这种结构，海鸥的腿部也有一个逆流交换系统。
The leatherback is certainly not the only animal with such an arrangement; gulls have a countercurrent exchange in their legs.
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