Families could invest as little as $ 3 to buy a kit that irrigated a 40 - square - meter kitchen garden , then reinvest some of the 300 percent annual return it generated to expand the system ' s coverage up to an acre or more 农家只要投资三美元，购买一套足以灌溉40平方公尺菜圃的组件，便可使年收益增加三倍；然后再将这些额外增加的年收益，拿出一部份来扩充系统，使灌溉面积增加到0 . 4公顷以上。
2.
From these decayed sons and daughters of gaul , she had acquired such wonderful arts , that the woman and girl who formed the staff of domestics regarded her as quite a sorceress , or cinderella s godmother : who would send out for a fowl , a rabbit , a vegetable or two from the garden , and change them into any - thing she pleased 她从这些式微的高卢后裔处学来了那么多精采的技术，就连仆妇女佣中的佼佼者也都把她看作女巫或是灰姑娘的教母：只须从禽场菜圃订购一只鸡一只兔一两棵菜，便能随心所欲做出自己想做的美味佳肴。
