A standard one. Replacement during the first year if all rules for proper use have been followed.
有一个原则,如果在一年内符合各种使用规定,就可更换。
On the other hand, those who dislike noise will sometimes use most inadequate evidence to support their pleas for a quieter society.
另一方面,那些讨厌噪音的人有时会用不充分的证据来支持他们希望有一个较为安静的社会环境的要求。