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A morality bank in a northeastern Chinese city has seen residents flocking to open accounts that enable them to exchange good deeds for free services.
Citizens in Yanji in Jilin province can accumulate credits with the morality bank through kind acts. Tasks include collecting waste plastic bags off the streets, which can earn 10 points, handing in a lost wallet, 50 points, and donating blood, 200 points.
Top credit-earning deeds include helping out others in a dangerous situation, with 300 to 500 points, and donating stem cells, with 1,000 points.
Credits can be traded for rewards such as a free haircut which costs 150 points, home cleaning, 500 points, and a health checkup using 1,200 points. People who collect more than 6,000 points will be rewarded a title of "Community Moral Model".
More than 600 residents have opened accounts since the bank was established a couple weeks ago.
morality bank n. 道德银行
即存储良好道德行为习惯的银行。通过该银行，居民可把自己的优秀道德行为兑换成一定的道德币，以换取免费服务。比如，捡垃圾袋可以换10分的道德币，捐血可以换200分，等等。用自己积累的道德币再去换免费服务，比如理发需要150分，体检1200分，等等。
flock v. 蜂拥，群集
flock to后面可以直接跟名词，也可跟动词不定式。
例句：
Tourists have been flocking to this little island since Madonna raved about it in an interview. （自从麦当娜在一次采访中对这个小岛赞不绝口之后，游客就蜂拥而至。）No matter what negative reviews the Transformers movies have received over the years, people are still flocking to see the latest installment. （无论《变形金刚》系列电影这些年来收到多少的负面评价，一旦最新的一集上映，人们总是挤破了头去看。）
accumulate vt. 积累
hand in vt. 上交，递交
该动词短语主要适用于三种情形：1，作业（或类似作业的东西，如论文）；2，捡到的东西；3，辞呈。
例句：
Please hand in your dissertation by Thursday afternoon. （请在周四下午前上交论文。）
I have found a 20-yuan note on the street. It’s not a big sum, but I’m going to hand it in nonetheless. （我在街上捡到一张二十元的纸币。虽然数目不大，但我还是会上交。）
No one saw it coming, but the general manager handed in his resignation today. （谁也没想到，总经理今天突然就递交了辞呈。）
stem cell n. 干细胞
以前做过详细介绍，此处不再赘述。
a couple weeks ago 几周以前
效果等于a couple of weeks ago，of加不加都可以，没有实际区别。