How often should you visit the dentist for professional dental cleanings ?

到牙医那里去接受专业洗牙治疗应该多久去一次呢？

Your pet 's teeth don 't have to be brushed every day , but weekly cleanings are a start .

你的宠物的牙齿没有被刷天天多起来，但每周的清理是一个开端。

Don 't know the number of cleanings that this cartridge can perform .

不知道这个磁带可以执行的清洗次数。

Often from six to eight weeks elapse between cleanings .

每次清洗相隔六至八周。

Hopefully conservationists can target such areas for greater protection , making it easier for sharks to get their healthy , necessary , and probably very enjoyable cleanings .

环保主义者很可能将这些地区作为加强保护的目标，让鲨鱼更容易接受健康、必需，而且可能非常享受的清洁。