制作一台全息照相显影密度仪，该仪器在暗室中，显示清晰，使用方便，对提高工作效率，节省材料，制作优良的全息图有很好作用。
The instrument has features of clear digital display and easy operating in dark room. It raises working efficiency, saves material, and has good effect on taking fine hologram.
黄瓜对皮肤有很好的治疗作用。
你必须对自己的团队有很好的了解，要弄清楚对于他们来说类似的东西是否真的可以起到正向强化的作用。
You should know your team well enough to know whether or not something like that would be positive reinforcement for them.
应用推荐