Currently in initial production , the off - axis viewing device （ oavd ） is a small viewing unit that mates with a weapon s existing receive - mounted optical sight and provides an image of the target transmitted through the scope and reflected 50 to the line - of - sight back to the firer 目前，初期生产的离轴式观察装置（ oavd ）是一种与装在支座上的光学瞄准具相配的小型观察器，它能将透过物镜的目标图像折射50到视线方向，再提供给射手。
Youngsters who eak excellent english learnt abroad tend to receive low marks on chinese state exams , while cla mates with little ability to use the language can become experts in taking multiple - choice exams testing o cure grammar points and little - used vocabulary 在中国的官方考试中，出过国能说一口漂亮英语的孩子往往只能得低分，可几乎不能实际运用英语的同学却是考试中回答选择题的行家，而那些选择题测的是晦涩的语法点和冷僻的词汇。
To explain this , biologists have theorised that these females are mating with males who are genetically superior to their regular mates , thus getting the benefit of parental assistance from a cuckold and good genes from a lothario 为了解释这种现象，生物学家们理论化地讲道，这些雌性与其它一些雄性进行交配是因为它们比自己的正常配偶更具有优秀的遗传能力，这样雌性土拨鼠不仅能够得到雄性土拨鼠对幼畜的照料，同时又能得到洛斯里奥的优良基因。
One chimaeric mouse was produced by injection of es cells into blastocyst of c57bl / 6j . the chimaeric rate of fur colour was about 15 % . fl generations of germ - transmission derived from es cell were not obtained when chimaeric mouse mated with kunming albino mice and c57bl / 6j mice 将胚胎干细胞注射到c57bl 6j小鼠的囊胚腔内，移植后产生了一只wk2 -胚胎干细胞的雄性嵌合体鼠，毛色嵌合率为15左右，成熟后分别与c56bl 6j和昆明白雌鼠交配，均未得到来自es细胞的后代。
Yvf2 series frequency - variable and speed - regulative three - phase asynchronous motors are suitable for running in frequency changer and speed regulation system which the power is supplied by a frequency converter . this new series of product designed unitedly in the country can be mated with all kinds of spwm frequency changer and speed regulation devices and is equipped with a separate cooling fan which ensure the motor for good cooling at various rotating speed 系列变频调速三相异步电动机是适用于由变频器供电的变频调速系统中运行的专用异步电动机，是全国统一设计新的专用系列产品，可与国内、外各种spwm变频调速装置配套，装有独立的冷却风机，能保证电机在不同转速下有良好的冷却效果。
We adopt principles and ideas of genetic programming ( gp ) , a kind of overall optimization algorithm , integrate it with geographic information technology and design geographic information system about forecast of plant diseases and insect pests ( dpf - gis ) that has been used in gansu province . we get the forecast models that mate with the true results by the characteristic of adaption optimization , intelligent search of gp , and predict the degree of epidemic diseases 本论文采用近年来迅速发展的一种全局优化方法?遗传程序设计( geneticprogramming ，简称gp )的原理和思想，结合地理信息技术，设计出甘肃省病虫害预测地理信息系统( geographicinformationsystemaboutforecastofplantdiseasesandinsectpests ，简称dpf - gis ) 。
