Separate the internal representation of the product from the construction process of the product. Q: How can they be separated? Answer: Don't put the construction process of the product in the product class, but the builder class is responsible for the construction process, and the internal representation of the product is put in the product class, so it is not separated.The use of weightlifting belts can also make weightlifters have a clearer and more accurate feeling of their back position when lifting weightlifting objects. Weightlifting belts do not need to be tied too tightly to have obvious effects. It has been reported that many weightlifters will feel safer and more confident in the weightlifting process even if the intra-abdominal pressure and muscle contraction are not affected in any way after using weightlifting belts. On the other hand, long-term use of belts will somewhat rely on belts, especially psychologically. Without belts, results will inevitably decline or confidence will be insufficient. However, for amateurs who are not standing in the highest international arena, do you care about the "false moisture" results brought by basic protective equipment and refuse to use belts? Or do you care about the safety and confidence brought by protective equipment?In addition, As Zhang Xiaobo said, On the front line at that time, Wearing or not wearing a helmet is a "choice", Because Vietnam is located in Southeast Asia, The climate is hot and humid, Helmets are heavy and airtight, Wearing it is very easy to cause heatstroke, Particularly in fast maneuvers, This is the easiest way to do strenuous activities such as running. Therefore, in order for the troops to fight more efficiently, There would be no mandatory order for everyone to wear a helmet, If you don't want to wear it, you can choose to wear a cloth cap with eaves. So in the vast majority of relevant historical photos, Among our troops participating in the war, The highest percentage of helmets is worn by artillery, It is mainly used to defend the fragments of enemy artillery and various hard objects brought up by explosions in artillery warfare. Even some border militiamen wore helmets in large numbers, On the contrary, the impact is at the forefront, Infantry units carrying out a large number of mobile combat missions are rarely worn, Investigate its reason, It is for the infantry troops to carry out large-scale interspersed operations frequently. Exercise is enormous, It is really inconvenient to wear helmets, This approach has both advantages and disadvantages, It is not good to judge right or wrong here, but when facing such a horrible "killer bee" on the ground on 149, it is regrettable and regrettable that the heavy casualties caused by the low wearing rate of helmets have to be said. If they had worn helmets instead of military caps like Zhang Xiaobo, the casualties caused by the sting attack of "killer bee" would have been much smaller.《向上的力量》是中国最权威、最高端、最具行业标准和代表性的演讲盛典IP。希望“用演讲记录历史，让演讲预见未来！”同时，也是一档汇集行业领袖、流量明星、资深学者、著名企业家、公益领袖等，以演讲为载体，传递正能量，分享价值的线下高端活动，和互联网短视频节目。《向上的力量》演讲盛典，是由中国日报、共青团中央宣传部、火星演讲会联合主办的国内最高规格的演讲盛典。它既是一个盛大的线下活动，也是一个线上的演讲节目录制。Panroong (Nok Sinjai 饰演) 是富家千金，任性而傲慢， 其家族经营远洋航运公司。她在和有钱的未婚夫Yrsuedpo 订婚后，却因为爱上了一位实为花花公子的赌徒Chu 而悔婚。她义无反顾的嫁给了Chu （第一任丈夫），并将家族企业交给Chu 打理，Chu 最终导致其家族破产并因为杀人而入狱20年。You can see that the code is simpler and clearer.吴凌珑又上前拉了拉沈悯芮，顺便劝道，你姐姐人很好，只是太突然了，无法接受，你给她几天时间，肯定能处好。
