它必须用20倍的双筒显微镜加以检验。
It must be checked by examining it under a 20 power binocular microscope.
要是你拥有一副双筒望远镜或者显微镜的话，那就尽情观察吧，外面至少有500万种物种等着你呢！
If you own a pair of binoculars or a microscope, there are at least 5 million species out there awaiting your gaze.
要是你拥有一副双筒望远镜或者显微镜的话，那就尽情观察吧，外面至少有500万种物种等着你呢！
If you own a pair of binoculars or a microscope, there are at least 5 million species out there awaiting your gaze.
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