In this case study (also from the Observer article), HP replaced all 160 PC's with newer models for about five times as much money — with two tons of e-waste.
在这里的研究中(同样来自于《纽约观察家》的文章)，惠普将所有的160台PC更换为新型号，花了大约五倍的价钱——还有两吨重的电子垃圾。
Objective To study the relationship between the occupational stress and the hypertension (HP) and some main causes which induced the occupational stress.
目的研究职业紧张与高血压之间的关系以及引起高血压发病的主要职业紧张因素。
Objective: To study the following project in radical cure of helicobacter pylori (HP).
目的：研究幽门螺杆菌根除治疗二线方案。
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