必须的

But for that you need to hold your serve. I really didn't really serve really well today, so I had to mix it up with something, just think about something, because from the baseline I wasn't really, really great at beginning.

但你也必须保住自己的发球局，我今天发球真的没有很好，所以我必须多做一些变化，因为今天刚开始在底线我真的表现不好

Education must serve the needs of socialist modernization, be integrated with productive labor, and train builders and successors who are well developed mora...

教育必须为社会主义现代化服务，必须同生产劳动相结合，培养德智体全面发展的者和接班人。

Napping has to be spontaneous; they have to feel the need to go and sleep.

小睡必须是自发的；他们必须觉得有需要去睡觉。

"It is impossible for every child to be an Olympic gold medal winner, and I want parents to understand that children must have education to fall back on," Yu said at the university's natatorium in Beijing

这位同时拥有体育社会学、教育学博士学位的教练员谈起她的队员必须得放更多的精力在学习上，"不可能所有的人都去参加奥运会都去得奖牌，所以我想让那些家长知道，他们，必须要学习必须要教育。"

To build these skills, lifelong learning must become normality, and three main barriers have to be overcome.

为了培养这些技能，终身学习必须成为常态，三个主要的训练参与障碍也必须加以克服。

You've got to find out what is it that you're required to do on a regular basis.

你必须去找出那些事情是在正常情况下你必须要做的。

We have to get it organized and we have to have the right structure and the right support.

我们必须做好组织工作，我们必须要有适当的体系和支持。

As Jeff Roberts, CAE group president of innovation and civil training and services said, First and foremost, it has to be line oriented.

首先，维护培训必须针对航线维护，必须具备操作性和实践性的基础课程。

If you can recall past incidents where you can show your flexibility of approach and how you adapted yourself to varied circumstances, it would demonstrate how you can outscore others.

同时，在T568A标准和T568B标准中仅使用了双绞线的1、2和3、6四条线，其中，1、2用于发送，3、6用于接收，而且1、2必须来自一个绕对，3、6必须来自一个绕对。

You must parenthesize ppi to ensure that the compiler parses the declaration correctly, and you must delete the allocated memory.

你必须把 ppi 放入括号内以便编译器可以正确地分析这些声明，并且你必须地释放这些分配的内存空间。

This paper discusses design and realizable methods of remote test output interface from logical design angle.

本文从逻辑设计的角度讨论遥测输出接口的设计及实现方法。

This also 星体投射plies to buildings, structures and geological features.

这也适用于建筑物和地质特征。