This is something we all need to be guarded against.

这是我们大家都需要警惕的。

Along the trail, once surveyed, poured caravans heavily guarded by armed men against marauding Indians.

沿着小径，一旦经过调查，便会涌出由武装人员严密看守的商队，以防止掠夺印第安人。

He adjusted one of the little suspensors that guarded his fat body against the pull of gravity.

他调整了一个保护他肥胖的身体免受地心引力影响的小吊带。

Their speed was slow, however, because pitfalls were somewhat common, and had to be guarded against.

不过他们的速度很慢，因为坑坑洼洼的地方有些常见，需要提防。

Hence, if the ambiguity is not guarded against, we may come to think that whiteness is an 'idea' in the other sense, i.e.

因此，如果不注意歧义， 我们可能会认为白色是另一种意义上的“想法” ，即。