有时它们抵触
Sometimes they conflict.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
这两个目标不总是互补的：有时它们相互抵触。
These two aims are not always mutually complementary: at times they conflict.
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These two aims are not always mutually complementary:at times they conflict.
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