Are you looking for Jessica? I saw her a short while ago. 5. 表达 “worth your while” 的意思是 “值得你下功夫去做，对你有帮助”。 Even though we only had a short while together, we hope this lesson was worth your while.

Basic系列去离子纯水机以城市自来水为水源，可快速制造RO反渗透水和DI去离子水，取代传统低效的蒸馏水机制备方法。具备全自动控制系统、背光式LCD屏幕、2路水质监控、RO膜防垢冲洗等功能，保证水质的同时延长RO膜寿命。提供多种安装模式和选配选项，满足 ...