He or she says good morning or good afternoon or something like that and you all, as a class,you answer.
VOA: special.2009.11.05
If we have a high frequency, what about the wavelength, long or short? All right. Good. So we should always be able to keep these relationships in mind.
如果频率高,那波长是长还是短?,好,不错,我们要记住这些关系,类似的。
Why should we weigh all preferences that people have without assessing whether they're good preferences or bad preferences?
为何该同等看待所有偏好,而不区分其好坏呢?
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