Broodstock whether the breeding period, the performance can be observed through the fish. Common to several tail goldfish in the container chasing each other, play, roll, and so on, very active performance. This indicates that the goldfish has reached breeding time, may lay their eggs fertilized and reproduce. Should now do all the work required to breed. Waiting for goldfish eggs fertilized. Or the use of artificial breeding methods. Goldfish breeding, can be divided into two kinds of reproduction, natural reproduction and artificial propagation.
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Recently people are active in the study on high performance modification techniques for PP. Some very important modification techniques for PP are introduced in this paper.
有关聚丙烯的高性能化技术的研究近年来十分活跃，本文仅介绍其中几种典型的改性技术，供大家参考。
The control of Active Power Filter (APF) is very important to its performance.
有源电力滤波器(APF)的控制是影响其性能的重要因素。
The problem of calibration of aperture distribution and diagnoses of faults is very important to assure the proper performance of the radar in modern large active phased array radar systems.
现代大型相控阵雷达天线系统的口径分布和故障诊断对保证雷达的正确性能非常重要。
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