These devices "nc and maintenance" of professional practice play an important role in teaching, good effect.
这些设备在“数控加工与维修”专业的实践教学中发挥重要作用，效果很好。
Their viewpoints and practice play an extremely important role in breaking with conventions, overcoming fatuity and emancipating mind at that time.
这些观点和做法，在当时对于打破守旧、克服愚昧、解放人心等都起了极为量要的作用。
Play can also provide practice in social behaviors needed for courtship and mating.
玩耍还可以为求爱和交配所需的社会行为提供练习。
Play also stimulates the development of the muscle tissues themselves and may provide the opportunities to practice those movements needed for survival.
游戏也会刺激肌肉组织的生长，并能提供练习生存技能的机会。
In other words, they play in order to practice survival skills, like movements used in hunting and fighting.
换句话说，他们的玩耍是为了练习生存技能，比如狩猎和战斗中运用的动作。
Play allows a young animal to explore its environment and practice skill in comparative safety since the surrounding adults generally do not expect the young to deal with threats or predators.
玩耍可以让一只小动物探索环境并在相对安全的环境中练习技能，因为周围的成年动物通常不期望幼崽应对威胁或捕食者。
Prey species, like young deer or goats, for example, typically play by performing sudden flight movements and turns, whereas predator species, such as cats, practice stalking, pouncing, and biting.
比如说，像小鹿或者山羊这种被捕食的种群，它们的代表动作就是突然快速逃跑的动作和突然转弯；相反的，猫科动物之类的捕食种群会练习潜行追踪、猛扑和撕咬等动作。
It takes a lot of practice to play the violin well.
拉好小提琴需要多加练习。
Hi, Jack! I'm just going to the practice for the concert. Are you coming to play your violin?
嗨，杰克！我正要去排练音乐会。你要来拉小提琴吗？
It was a tradition for the school's old team to play against the new team at the end of spring practice.
学校有项传统，就是在春季训练结束时，学校的老队会与新队比赛。
It may seem a simple affair to play upon a violin; yet what a long and laborious practice it requires!
演奏小提琴似乎是简单的事；然而这需要多么长期和艰苦的练习呀！
"That way I could reserve a table for my son at any time, and more people would come to play, which would help him practice." said the father.
“那样我就可以随时为儿子预留球台，而且有更多的人过来打球也可以帮助他练习，”父亲说道。
Do you learn best by example? See one way freewriting can play out in practice.
你通过举例的方式会学的最好吗？看单面的随便可能在实际上用完。
Yet, while panic is never beneficial to investors, it's good practice to play devil's advocate with investments from time to time.
当痛苦不再能带来经验的时候，不时的同魔鬼的代言人玩玩是一个很好的练习。
Through play children learn and practice many basic social skills.
通过游戏，儿童学会很多基本的社交技能，并不断练习。
Sorting and relevancy enhancement (boosting) just use the distance calculations, and I'll show how they play out in practice later in the article.
排序和相关度改进仅使用距离计算，我将在本文的后面介绍它们的实际应用。
I play to win, whether during practice or a real game.
无论是在练习中还是在真正的比赛中，我都是为了胜利而战斗。
With smaller kids it’s helpful to practice the routine so they get a feel for it. (Like role-play).
对于年幼的小孩子，实践会对他们有所帮助，他们能从中获得上述的自我价值感和能干的感觉。
The practice is mostly carried out by traditional circumcisers, who often play other central roles in communities, such as attending childbirths.
切割大部分由传统的切割者实施，这些切割者通常在社区中扮演进行接生等重要角色。
Dikembe Mutombo told me Yao likes to practice as much as most players like to play.
穆托姆博曾告诉我，姚明喜欢训练就像大多数球员喜欢比赛一样。
In practice only the US economy and financial system were large and flexible enough to play this role.
实际上，只有美国经济及金融体系的规模和灵活程度能够胜任这一角色。
Another time, I cut altar boy practice to play hockey on the frozen pond at Mack Park near my home.
还有一次，我提前结束了圣童训练去我家附近的马克公园真冰场玩曲棍球。
This type of play will help them all their lives, as it is practice for stalking and killing prey and learning the social interactions of the pack.
这类游戏让它们终生受益，因为这是今后潜伏和猎杀的演练，并且是在学习与群体成员的社会交际。
Sound: play open strings alone; play slow scales, sustaining a 20- to 30-second bow; practice everything in the lower or upper half; or watch your contact point in the mirror.
音色︰只用空弦拉奏；慢慢地拉奏音阶，一弓维持在20-30秒；所有以上半弓或下半弓练习；或对着镜子看（弓的）接触点。
If you want to play real music that actually sounds good, get ready to practice a lot!
如果你希望能演奏出真正好听的声音，那就要加倍努力了。
Now, with volleyball practice, flute lessons, homework, play rehearsals, and the school newspaper, our kids can't find a place to schedule "Getting into Trouble" on their Blackberries.
现在，随着排球训练，长笛课，作业，排练和校报，孩子们不可能在手机上找到地方来安排“惹麻烦”日程啦。”
They play eight-man ball, although if a bigger school comes to town they switch numbers with every possession, so that each side can practice its plays.
他们按八人制的规则打球，如果来镇上比赛的学校人比较多，他们就会在每次控球权转换时调整人数，这样双方都能按自己习惯的规则打球。
They play eight-man ball, although if a bigger school comes to town they switch numbers with every possession, so that each side can practice its plays.
他们按八人制的规则打球，如果来镇上比赛的学校人比较多，他们就会在每次控球权转换时调整人数，这样双方都能按自己习惯的规则打球。
应用推荐