... 哦,是这个情况啊 » Oh, this is the case 在前期 » At the early stage 我对科学知识很感兴趣 » I'm interested in scientific knowledge ...
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他在前期准备时把每本剧本都从头到尾读过。
你需要在前期投入相当的时间和精力才能创造属于你自己的创收系统。
Sure it takes some upfront time and effort to design and implement your own income-generating systems.
This refers--this actually goes back to B.F. Skinner, a psychologist who flourished in the first half of this century.
这要追溯到B.F.斯金纳,一位活跃在上世纪前期的心理学家
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