必须

Monitoring languages and keeping them separate is part of the brain's executive function, so these findings suggest that even before a child can speak, a bilingual environment may speed up that function's development. Before rushing your offspring into Tongan for Toddlers, though, there are a few caveats.

但必须指出的是，双语环境能够帮助小孩子提高大脑执行能力的一个前提是，这些小孩子都生长在天然的双语环境，他们必须要在同一个环境下同时学习两种语言，或许这才是执行能力提高的关键。

You are required to have a passport and must fill out a tourist card at customs.

你必须有一本护照，必须填写一张旅游卡在海关。

If you give me a lesson and you say:"your slurs are very bad and your tremolo is fantastic, so you must practice your slurs", I know I will go home and practice my tremolo!

如果你给我上课，并且说："你的连音弹得不好，而你的轮指实在是太妙了，因此你必须要加强连音的练习。"那么我知道我必须回家去练习我的轮指！

Trilemma effect is an important criteria for the self-convergence deflection system.The influence of the higher order Trilemma effect should be taken into account for the correction of the higher-order deflection aberrations.In this paper,when up to the seventh-order Trilemma constants are adjusted,the expression of the influence of 2n-pole multipole field on n-th order Trilemma constant has been deduced and this influence has been calculated.

Trilemma效应［1，2］是在彩色显像管中应用自会聚偏转系统对偏转像差校正时所必须考虑的一个重要问题，在大偏转角下对高级偏转像差的校正必须考虑高阶Trilemma效应的影响，文献［3］应用多极场偏转像差校正理论［4，5，6］，采用区域分割的方法，对直至七阶的Trilemma效应进行了分析，在文献［3］中对Trilemma效应分析时，用到了下面的近似

He had to read wind speed, direction and drift; assess, from the speed of the lumbering Ford Trimotor aircraft and his watch, the size of the fire; find, and mark with streamers, a suitable place to drop that was free of "snags", felled logs, stumps or boulders; check every inch of kit and harness, every buckle and strap and pin, and then tap each man on the left leg to make him jump.

他必须测量风速、风向和风漂流；通过笨重的福特三发动机飞机飞行速度和自己的手表测算火势大小；找到并用彩带标记合适的空降地点，那里必须没有"残根"，倒下的木头，树桩和大石块；仔细检查装备和背带，每一个扣环、带子和徽章都不放过，然后在队员左腿上拍一下示意可以跳伞。

We have got to show moral support for Georgia, we have go to show moral support for Ukraine.

我们必须向格鲁吉亚提供道义上的支持，我们必须向乌克兰提供道义上的支持。

They were to be unblemished males, the largest and strongest animal, since perfection was necessary.

祭物必须是没有残疾的雄性动物，并且肯定是又大又壮，因为它必须完美无瑕。

There is also an unbloody 'martyrdom,' which is no less significant, such as that of Celina Chludzinska Borzecka, wife, mother, widow and religious, beatified yesterday in Rome: It is the silent and heroic testimony of many Christians who live the Gospel without compromises, fulfilling their duty and dedicating themselves generously in service to the poor.

这是一种属於爱的和平的战斗，是每位基督信徒，像圣保禄一样，必须勇敢奋战的；是我们必须坚持到死的传播福音的赛跑。祈求殉道者之后、福传之星童贞圣母玛利亚帮助我们，支持我们每日作证。

All the above merchandise must be packed in strong undamaged cartons,and must be properly sealed and strapped .

以上所有产品必须硬的且无损坏的纸箱包装，且必须适当的封条和捆绑。

We must be united, we must be undaunted, we must be inflexible. Winston S.

我们必需联合起来，我们必须无所畏惧，我们必须坚强不屈。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。