耐药性已使多数较陈旧的抗疟药物失去效用。
Most older antimalarials have been rendered useless by drug resistance.
在超过某个特定节点之后，金钱就失去它的效用了。
Money has no utility beyond certain point and the usage is the same toeveryone.
在超过某个特定节点之后，金钱就失去它的效用了。
Money has no utility beyond certain point and the usage is the same toeveryone.
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