他断言，在理解冗长且完全抽象的一系列观点方面，他的能力非常有限，因此他深信自己在数学上永远不会成功。
He asserted that his power to follow a long and purely abstract train of thought was very limited, for which reason he felt certain that he never could have succeeded with mathematics.
试想一下，这种药制作简单，服用安全，且完全能免费获取。
Imagine that this drug were simple to make, safe to take, and could be had for free.
这款iRetrofone的基座是全功能固定式iPhone底座，可与手机对接，且完全兼容USB线缆。
The iRetrofone Base is a fully-functional, stationary iPhone dock with working handset and complete compatibility with USB cable.
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