The question “What happens when the wind doesn’t blow or the sun doesn’t shine?” has provided a quick put-down for skeptics. But a boost in the storage capacity of batt...
7.keep...company 陪伴 eg: He stayed at home to keep his wife company. 他留在家里陪伴太太。 8.take effect 生效,起作用 eg:The pill takes effect as soon as you swallow it. 这...
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