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It is necessary to walk them in the park once a day if you want them to be healthy.

如果你想让他们健康的话，每天带他去公园散一次步是必要的。

In the first chapter, the one - to - one correspondence between mild solutions of an abstract deday equation and mild solutions of an associated abstract Cauchy problem is shown, and necessary and sufficient conditions for existence and uniqueness of mild solutions of the abstract delay equation are obtained.

全文共为三章，在第一章中，说明了抽象时滞方程的mild解与相应的抽象柯西问题的mild解一一对应，并且得到了抽象时滞方程的mild解存在唯一的充要条件。

If it were that simple, it would merely be necessary to have a one-to-many relationship between Contact and Company, but it's more complicated than that.

如果就这么简单的话，就只需要在联系人和公司之间建立一对多的关系，但是实际情况有点复杂。

In hatcheries, early ontogenetic stagesare often maintained in high densities and （data on oxygen demand andammonia-N release rates ）are necessary for a correct dimensioning ofstructures and routine of cultivation.

在孵化室/所里，早期个体发育的各阶段通常保持在高密度下，氧气需求数据及氨-N的排泄率是正确计算培育结构与常规所必需的

So, it is necessary to discuss production from the ontological essence.

因此，对于马克思哲学这一重要基础性的概念的存在论探讨是非常必要的。

Secondly, they don't think quantum collapse is necessary, and there is not ontologically different between mind and body, it is just epistemological division.

意识和物质具有相同的地位，但是，这不过是错误的划分，因为两者的区分并非本体上的差别，而是认知上的不同，在它们之下，还有更深层的结构。

Therefore, it's necessary to study the assessment of the oocyte quality.

因此，有必要在卵母细胞的判定标准上做进一步的研究。

Therefore, it is necessary to study how to integrate real-time application with open system architecture.

因此产生了开放系统与实时应用之间的融合问题。

Therefore, it is necessary to study how to integrate mobility-oriented application with open system architecture.

因此产生了开放系统包容移动性应用的问题。

Then you can open the assembly and set some Binding Flags, which are necessary for the instantiation of the chosen type

然后你可以打开组装并设置一些有约束力的旗帜，这是所选择的类型实例化需要

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。