If an application uses a large number of objects, and a large number of these objects cause a large storage overhead, it should be considered. Also, most of the states of the object are external states. If you delete the external states of the object, you can replace many groups of objects with relatively few shared objects, or you can consider using the meta-sharing mode.
Use Python for data analysis: This book is a detailed version of Python's pandas package. Learn this to master some basic pandas commands. However, this is not the point, because pandas is too slow to produce a large amount of data and may collapse (I don't know if there is any improvement now-!) The point is, through studying this book, I feel a little about the data operation and am familiar with the basic data operation process. All the operations in this book can be replaced by native Python, and Pandas package is not needed. Finding feelings is very important.
Wang Leehom
麻美（京野ことみ饰）对Pizza送货员山下（池内博之饰）一见钟情，开始在网页上留下爱的宣言，打电话给他，最后还跟踪到他家向他表白。
1968年，北京的钟跃民和好友袁军、郑桐等整日游荡在大街上，为单调的生活寻求着刺激。在一场钟跃民看来似乎平常的不能再平常的恶作剧中，高雅、纯情、浪漫的周晓白无意中闯进了钟跃民的生活，二人的生活悄无声息的改变着。晓白的高雅、浪漫唤醒了潜藏在跃民内心深处的一种久违了的渴望。在袁军、郑桐等童年伙伴的戏弄下，钟跃民向晓白展开了充满嬉闹而又看似认真的追求。
The third level is calculated based on the second level, because there is no specific calculation formula for the small ban on aid, so let's calculate the clarion call for the decisive battle.
被称之为「蓝色城区」的未来城市－－在那里，有个每到晚上就停电而被黑暗笼罩的城镇－－「夜之镇」。
This is a high-speed shutter, which instantly solidifies water droplets.
芝加哥天气预报员大卫，被他的粉丝们热爱，也被诅咒--这些人在天气不好的时候会迁怒于他，而大部分时候，大卫都是在预报坏天气。不过，这也没什么，当一家国家早间新闻节目叫他去面试的时候，大卫的事业似乎又将再创新高。在电视节目上，大卫永远微笑，自信而光鲜，就像每一个成功的电视人一样，说起收入，他也绝对不落人后。不过，大卫的个人生活可就不那么如意了。
范文轲冷笑道：大哥，不要说的这样冠冕堂皇，也不要这样指责我。
A make more components when modeling, so if there is a problem, only one component will be modified, and the rest of the copied components will be automatically modified in association, mainly for multiple copied windows, doors and the like.
……澎湖主岛货港，杨长帆手下首领胡长安与弗朗机商人卡莱陷入争执，眼看要动手，杨长帆与徐文长闻讯赶到。
-Routine Auxiliary Examination Item for Physical Examination and Identification of Civil Aviation Flight Students
十九世纪中叶至二十世纪初的自贡，无疑是中国的庞贝城，亦是封建农业社会包围之中的一座手工业城市，其实中国的资本主义已有此地土生土长、生根发芽，发展得相当成熟。
嘉靖将全部看在眼里。
到达傅家庄之后，接二连三发生的事件引发了过去的恩怨情仇，小草的身世之谜也有了线索，今昔交织说不尽沧凉的悲欢离合，道不完可爱可哀的新仇与旧事……
The half-time break in other basketball matches is ten minutes.
