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 .
