求翻译：因为一旦一种证券不景气时另一种证券的收益可能会上升，这样各种证券的收益和风险在相互抵消后，仍然能获得较好的投资收益。是什么意思？

Cancel each other out because once a recession securities, other securities income may rise, so that the benefits and risks of various securities can still get a good return on investment.

Because as soon as a sluggish stock while the other types of securities of the revenue may rise, so that the various benefits and risks of securities in offset each other and still be able to get a better return on investment.

Once because one kind of negotiable securities not booming time another kind of negotiable securities income possibly can rise, after like this each kind of negotiable securities income and the risk are counterbalancing mutually, still could obtain the good investment income.

Because once a securities gains when a stock slump may rise, benefits and risks of various securities after cancel each other out, and still be able to get a better return on investment.

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