Do not hold one hundred percent of hope without a grasp of one hundred percent.

没有百分之百的把握就不要抱百分之百的希望。

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Readers without a grasp of the so-called standard model in particle physics may well flounder in the chapter on the physics prize.

ECONOMIST: Nobel prizes

A-level too: it's possible to get an A in maths without a solid grasp of calculus, for example.

ECONOMIST: Exams

Still, the model has its issues (other than the obvious fact that it may simply be too complex for all consumers to grasp without a great deal of explanation).

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