In additions, this is the first time they've had to make decisions on their own.
另外,这也是他们第一次需要为自己的事做决定。
They generally do well in additions and subtractions of numbers short than 20, but few knew what multiplication or division is.
同学们对20以内数的加减法掌握较熟,而大部分都不知乘除为何物。
In additions the paper qualitatively analyses the influence of residual stresses occurring after quenching and tempering and the process of heat treatment on the formation of the cracks.
此外,还定性分析了淬火、回火后残余应力的性质及热处理工艺过程对裂纹形成的影响。
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