不管怎样,这些带子是完全安全的,一些蜂鸟已经戴上这些带子很多年了,没有出现任何问题。
Anyway, these bands are perfectly safe, and some humming birds have worn them for years with no evidence of any problems.
带子把婴儿安全地系在里面。
带子扣上的人又有一半的带子太松,以致于不用动扣子就可以把安全帽戴上或取下。
Of the ones that do up the strap, about half have them so loose that they can put-on and remove the helmet without unbuckling.
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