In a post last spring titled “Makers of Tylenol, I’m Disappointed in You” on the blog DC Metro Moms, Ms. Lam wrote about the huge recall of J.& J. infants’ and children’s medicines.
去年春天，林女士在“特区大都市妈妈”的博客中写过一篇题为“泰诺制造商，我对你感到失望”的文章，说的就是强生公司大量召回婴幼儿药品的事情。
The dissoluble corrosion of Guangzhou metro engineering concrete in direct current was studied by an accelerated DC dissolving test of the residue mortar and correlating it with concrete.
通过加速试验方法研究了直流电流作用下混凝土筛余砂浆的溶蚀性能，并建立了其与广州地铁工程混凝土在杂散电流下的溶蚀性能之间的关系。
Research conclusions:According to the research results, the DC 1 500 V rigid suspension overhead catenary system is recommended for the first metro line of Haerbin.
研究结论：根据研究的结果，推荐哈尔滨地铁一期工程正线采用DC1 500V架空刚性悬挂。
This paper mainly introduces an optimum design scheme for the frame leakage current protection of DC traction power supply system in metro engineering.
介绍了地铁直流牵引供电系统框架泄漏保护的优化设计方案。
Negative impedances lead to DC-link voltage and current oscillation in metro traction converters and so to reduction of stability of traction drive systems.
负阻抗会引起地铁车辆牵引变流器直流侧电压、电流振荡，降低牵引传动系统稳定性。
The significance of electrical protection and definite value of DC traction power supply system for metro is illustrated.
阐明地铁直流牵引供电系统电气保护设置与定值的重要性，着重论述地铁电气保护设置的主要原则。
The significance of electrical protection and definite value of DC traction power supply system for metro is illustrated.
阐明地铁直流牵引供电系统电气保护设置与定值的重要性，着重论述地铁电气保护设置的主要原则。
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