But if improving their hunting luck was the chief motivation for the paintings, it is difficult to explain why only a few show signs of having been speared.

但是，如果增强他们的狩猎运气是这些画的主要动机，那么就很难解释为什么只有少量画作有被长矛刺过的迹象。

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It is difficult to explain.

这很难解释。

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It is difficult to explain such result by the effect of greenhouse.

这种结果很难用温室效应来解释南极与全球气候变化的差异。

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And this is no surprise if what we are is the workings of our physical brains, but it is extremely difficult to explain if one is a dualist.

如果我们的本质就是生理大脑的活动,那这也就没什么可惊奇的,但对于二元论者来说,解释这些却是非常困难的

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The flaws in the tax-power argument are so numerous and abstract that it is difficult to explain them succinctly.

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But if Labour and the unions are working hand-in-glove, it is difficult to explain the timing of this latest round of walkouts.

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It is difficult to explain to any soccer fan under the age of 35 (perhaps even 40) how difficult it used to be to travel or to move to another country and to keep tabs on your favorite team.

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