2. Mathematical period: For a function f (x), if there is a non-zero constant T, so that when x takes every value in the domain, there is f (x + T) = f (x), then the function f (x) is called a periodic function. The nonzero constant T is called the period of this function.
神秘博士再度归来！博士将踏足美国，与Amy和百夫长Rory展开全新征程，等等，还有！River Song，这个神秘莫测的女人将再次回到博士身边，River Song到底是谁？她和博士是什么关系？万众期待的“博士的妻子”一集也将在本季中播出，由科幻大师尼尔·盖曼亲自撰写的该集将会把剧情推向何处？又会揭开博士的哪些秘密？
Xmind: It can be exported to other software formats, but the exported HTML, PDF and Word styles are similar, the exported text format is not very beautiful, and the important thing is that it cannot be well compatible with Microsoft Office.
习题使她们内心产生极大的矛盾。而凑巧在现实生活中，平克劳斯贝和威廉霍顿也正在全力追求凯丽，闹得难解难分，也许凯丽已分不清银幕上下之别，所以演来特别感情投入。使她以二十六岁的年龄击倒了不少资深前辈，成为当时奥斯卡影史上最年轻的影后。
那五常是满族后裔，闻名长白山的神枪猎手。师傅杠爷希望他能够继承自己的衣钵成为长白山地区首屈一指的萨满大祭司。可是一切随着日军讨伐队进山扫荡改变了。那五常在一次狩猎时无意中闯入了日军讨伐队对某抗联队伍的围剿中，他凭借精准的枪法将女战士傅兰成功解救，与日本鬼子结下了梁子。随后，日本鬼子为报复那五常，将他爷爷杀害，毁了家园，侵占了猎场，他宁静的世界被彻底地颠覆了。他放弃了爷爷的遗愿，违背祖训操起猎枪，使用一切猎杀技能开始了对日本鬼子的复仇。在与抗日武装、抗联队伍的接触中，那五常日臻成熟，从见鬼子就杀到有节奏、有步骤、有计划、有重点地清剿日寇，令侵略者闻风丧胆。
20岁的茉莉因患病被告知仅剩10年寿命。为了不对活着这件事抱有执念，她决定不再恋爱。直到她在同窗会遇到了和人...
Room facilities are very complete, bathrobe, especially equipped with children's bathrobe, hairdryer, safe, mini refrigerator... all available, toilet without dry and wet separation, shower on bath! The exhaust fan in the toilet is very quiet, which is worth learning from by other hotels!
永平帝想为难大苞谷，故意问道：张兑，你以为如何？大苞谷先瞪了黛丝一眼，然后才大声道：三人都是小人妻子，不分高低贵贱。
《索尼克音爆》是索尼克系列的最新作，是包括电视动画、电视游戏以及商品化在内的全新系列。索尼克、塔尔斯、艾咪和纳克鲁斯以全新感觉示人，另有新角色斯迪克斯登场，索尼克的团队就此展开了搞笑而惊险的冒险故事，与永远的大反派艾格曼博士和他的机器人斗智斗勇，期间笑料和动作戏十足，快来一睹索尼克的3D新世界吧。
The Interface Segmentation Principle (ISP) means that it is better to use multiple specialized interfaces than to use a single total interface. That is to say, don't let a single interface take on too many responsibilities, but should separate each responsibility into multiple specialized interfaces for interface separation. Too bloated an interface is a kind of pollution to the interface.
The list of recent cooperators is all high-value beautiful girls.
At that tail of the warhead, the drag armour-piercing firebomb is filled with a drag agent and a fireagent, Under the pressure of propellant propelling warhead, it will spontaneously ignite to produce open flame, So it can break through the oil drum and ignite or detonate the gasoline. However, the old-fashioned traced armour-piercing firebombs have obvious trajectories due to traced light when they are launched. Therefore, it is very easy to expose oneself while pointing targets to friendly forces. Therefore, the new tracer armour-piercing firebombs now equipped all start to burn and emit light only after the projectile flies out of the muzzle for a certain distance (the generally set safe distance is 100 meters, which makes it impossible for the enemy to judge the firing position with tracer ammunition, while targets within 100 meters do not need to be indicated by tracer), The principle is generally to ignite the tracer and combustion agent carried by the projectile by accumulating the heat generated by the warhead's friction with the air after flying for a certain distance to a certain extent.
我们兄弟正是昆仑七剑。
改编自韩剧《需要浪漫3》
谁不认儿子了？事情还没弄清，怎么就成了亲爹娘不顾儿子了？花猫马上质问道：玄武王不是威风的很吗？这还没弄清是不是他弟弟，就被人伤成这样。
Like-minded, have the desire to participate in MDT;
MTV台已经预订了《少狼》第五季。
Auburn: longan, mango, litchi, tea, camphorwood, cinnamon …
