正面挑战美国是不明智的行为。

To challenge America head on made no sense.

youdao

三年过后，中国尚未做好正面挑战美国的准备。

Three years later, Chinaremains very far from ready to challenge America head on.

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而且，我们的确需要他们，因为很快我们就面临了来自谷歌(Google)和苹果(Apple)的全面正面挑战。

And boy did we need them to do that, because we soon faced full frontal assaults from the both Google and Apple.

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