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上环 shànghuán
IT up-loop
nurs. placement of IUD
tech. upper ring
导水机构上环 shànghuán
el. upper guide-vane ring
上环野生动物, 给鸟的腿上带上编号的环来记录鸟的移动。上环是一种非常普遍的用来跟踪鸟行踪的方法,并能提供鸟的年龄信息。但它也会给鸟带来压力。 shànghuán
environ. ringing wildlife, To attach a numbered ring to the leg of a bird so that its movements can be recorded. Ringing is a very common method of tracing bird movement and providing information about bird's ages. It can also cause stress to the birds
上环
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