Brushing teeth effectively can prevent periodontal diseases. But few people know how to brush teeth effectively.
有效刷牙能很好地预防牙周疾病，但懂得有效刷牙的人并不多。
He goes to his bathroom to brush teeth and wash his face.
然后去他的浴室里去刷牙洗脸。
Tom thinks it unnecessary to brush teeth three times a day .
汤姆认为一天刷三次牙是没有必要的。
Tom thinks it unnecessary to brush teeth three times a day .
汤姆认为一天刷三次牙是没有必要的。
应用推荐