number required的用法和样例：
例句
- It is wise to submit more than the required number of signatures, in case some signatures prove invalid.
阁下最好提供比要求数目更多的签名，以防其中有的签名被验证为无效。 - Currently, applicants can file an unlimited number of continuations having an unlimited number of claims.
目前，申请人可以提交后续申请的次数不受限制并且其中的权利要求数目也不受限制。
