Some rely on deception, while others engage in outright trickery.
有人靠欺骗,有人则直接耍点小手段。
For instance, some rely on the therapist who has treated a patient to subjectively evaluate how well the therapy worked.
举例来说,有些研究只依赖一个治疗师对一名患者的治疗结果,由此便主观地判断该种疗法很有成效。
Actually, there are some species of bats, the ones that don't use echolocation that do rely on their vision for navigation, but it is true that for many bats, their vision is too weak to count on.
事实上,有一些品种的蝙蝠不使用回声定位,而是依靠视觉来导航,但对很多蝙蝠来说,它们的视觉太弱了,确实不能依靠。
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