In the old system, two questions exist: it is difficult to differ subjective impossibility from objective impossibility, and impossibility from origin have no contract effectiveness.

旧的给付不能类型主要存在着是主观不能和客观不能难以区别以及自始不能使合同无效两方面的问题。

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The period of effectiveness an authorizing contract may not exceed 10 years.

许可合同的有效期限一次不得超过十年。

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Party A will be responsible for evaluating Party B during the contract period in order to help improve the effectiveness of Part B.

为帮助乙方更有效地进行教学工作，甲方将负责在聘用期内对乙方的工作进行评估。

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Ifremer, a French research institute which operates the Nautile, said it had signed a contract with the Spanish authorities to check the effectiveness of a previous operation to secure the wreck's leaking hull.

BBC: French sub to resume Prestige dives

Should this injury last longer than the initial diagnosis or limit the effectiveness of the ace, Greinke too may face questions about his contract.

FORBES: Ten Ridiculous Baseball Injuries