His anxiety about the work was just a passing phase.

他对工作的担心只是暂时的。

《牛津词典》

The teenage conflicts that erupt in most healthy families should not be taken lightly or ignored as a passing phase.

即使是发生在最健康家庭中的青少年问题，我们也不应该放松警惕，不该将其视作一种正常的过渡阶段而忽略它。

youdao

With each passing phase of the project, he or she must constantly develop and communicate his or her vision of both the system functionality and the project approach.

随着每个阶段的完成，她或他必须持续开发和交流她或他对系统功能和项目方法的构想。

youdao

And Mr Bush had previously said deficits would be merely a passing phase, a claim that looks increasingly dubious.

ECONOMIST: The state-of-the-union address

Recent governmental and intergovernmental activity in these areas is not a passing phase.

FORBES: Why The Next Apple, FedEx Or McDonald's Won't Come Out Of Europe

We now know that oak seedlings rarely thrive under mature oaks (which rain caterpillars on them), so the oak climax was just a passing phase.

WSJ: Ecology and Change: Nature Has No 'Balance' for Us to Keep | Mind & Matter