n. contractor
misc. contraction section
网络一代将必须收敛一部分他们的预期，按照这个世界本来的面目，而不是他们所期望的面目面对世界。
Net Geners will certainly have to temper some of their expectations and take the world as it is, not as they would like it to be.
在不同的时间下，不同尺寸的颗粒会撞击壁面不同的位置，但主要集中在壳体与喷管的相接部分和喷管的收敛段。
At different time, particles with different sizes can hit different locations on the wall, which are mainly at the connective part of shell and nozzle and out the convergent section of nozzle.
第二部分是在一致收敛条件下函数列、函数项级数以及含参量反常积分的性质。
The second part is in uniform convergence conditions function series, function and parameter improper integral. We properties.
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