un-, 不，非，flagging, 松懈。

1. He was sustained by the unflagging support of his family.

他得到了家人不断的支持。

2. The book is not one word too long and its narrative pace is unflagging.

这本书文字简洁，叙事流畅。

3. We owed the Shah a great deal for his unflagging loyalty during the October War.

我们应当大大感谢伊朗国王在十月战争期间表现的始终不渝的忠诚.

4. The co - operation of these governments requires unflagging effort.

政府间的这些合作需要坚持不懈的努力.

5. But market pressures are real and unflagging.

不过市场的压力却是真真切切,无可躲避.