If all such asteroids turn out to be harmless windmills, it will have been a wasted effort.

如果所有的行星都被证实是毫无害处的风车时，那就是白花力气了。

youdao

After the construction, all garbage in Jiguan district, the center of Jixi, and its neighboring districts and cities will be disposed harmless to improve the urban environment root and branch.

项目建成后，可使鸡西市中心鸡冠区及周边地区城市垃圾全部得到无害化处理，彻底改善市区环境。

youdao

If all such asteroids turn out to be harmless windmills, it will have been a wasted effort.

ECONOMIST: The American Association for the Advancement of Science

All the policy makers who formulate or acquiesce to this strategy will be held harmless.

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