Earlier this year Professor Hawking warned that exploring space may not be entirely without risk.

在今年早些时候，霍金教授警告，探索太空不是完全没有风险的。

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Their impact on long-term health may not have been fully established and they cannot be assumed to be without risk.

它们对长期健康的影响仍不可以充分证实，而且不能假设它们没有风险。

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Without this understanding, risk cannot be properly assessed and protection strategies may not be sufficient.

如果没有这种认识，风险无法正确评估和保护战略，可能是不够的。

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They would not be willing to take the risk without clear title to the land.

他们在明确土地所有权之前,是不愿意冒险的

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He conceded it would be a complicated mission not without risk.

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And a world without risk shifting would not be a happy or rich one.

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Second, bonds offer return of capital when held until maturity. (Corporate bonds are not completely without risk, so be sure to monitor the fiscal health of the issuer.) Finally, bonds have historically had low correlations with stocks. (When stock prices zig, bond prices often zag.) Thus, even in the current low-yield environment, bonds should not be ignored.

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