As historians thus came to know more about these collections they applied to their owners for permission to work in them, not always successfully.

（英译汉）这样一来，由于历史学家得以更多地知道这些收藏文档，他们就能向那些文档的所有者请求允许利用它们，虽然并非总是如愿以偿。

youdao

A service will not always work successfully, so the teams must agree on error scenarios and appropriate responses.

服务并不会始终成功地工作，因此团队还必须就错误情况和相应的响应达成一致。

youdao

When speaking, it's not always essential to be 100% accurate in using the language in order to communicate successfully.

当讲英语的时候，没有必要总是100%的语法正确，只要我们能成功的交流就好。

youdao

In sombre interviews done later, away from the battlefield, the soldiers try, not always successfully, to understand the meaning of what they were doing.

NEWYORKER: Restrepo

The city retains many of the old colonial Spanish city walls and fortifications which protected the city (not always successfully) from pirates and buccaneers.

UNESCO: Culture

The word mitzvah in Hebrew means both a duty and a privilege, and one thing I try to do (not always successfully) is to think about taxes as a mitzvah.

WSJ: Ask Ariely: Dan Ariely on Hot Wheels to Close Big Deals