Only when such regulations are strictly implemented, can we expect a safer environment.

只有当人们严格执行这些规定时，我们才能迎来一个更安全的环境。

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Such events occur only when the external conditions are favourable.

此类事件只有当外界条件有利时才会发生。

《柯林斯英汉双解大词典》

Such co-operation is likely to be stable only when each animal feel it is not being cheated.

只有当每个动物都觉得自己没有被欺骗时，这种合作才有可能是稳定的。

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Whether such an agreement is negotiated will only be known when the world's leaders convene in Copenhagen for the United Nations climate change summit early next month.

VOA: standard.2009.11.27

Only when such a black middle class emerges will the country really shed the divisions of the past.

ECONOMIST: South Africa set to plod on with Mbeki | The

Only when such a force is established, however, can he hope to win control over the country's rich diamond deposits and other valuable resources.

ECONOMIST: Sierra Leone

Only when such spots are commonplace will range anxiety finally subside.

ECONOMIST: Rational consumer