Carrying more than a light load on your bicycle makes it more difficult to control.

自行车上携带超额负载会使自行车更难以控制。

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This shows that teens may find it more difficult to control risky behavior when their friends are around, or in situations where they are extremely angry.

这表明，当他们的朋友在身边，或者在他们极度愤怒的情况下，青少年会发现更难控制危险行为。

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But he may make more difficult to control for his successors.

但是他也有可能使他的继任者们更加难以控制该行。

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However,this is more difficult because it is harder to control the diets of people and because they live longer than other animals.

VOA: special.2009.09.01

Unless carbon emissions are brought under control,he says, the challenge of adapting to global climate change will become ever more difficult.

VOA: standard.2010.06.14

"Of course, if this were to (spread to the community), it would make it much more difficult to control, " he said.

CNN: CDC: 'Nightmare bacteria' spreading

Unlike power plants, which are few in number and so easier to regulate, cars are ubiquitous and much more difficult to control.

ECONOMIST: The future of energy

But today's problem of non-point source pollution is more difficult to control.

CNN: Polluted rivers stain Portland's image