South America's most in-demand currency closed at BRL1.54 to the dollar, breaking through yet another psychological marker of BRL1.55.
巴西外汇市场收盘时，美元兑雷亚尔汇率收于1.54雷亚尔，跌穿1.55雷亚尔这一心理支撑位。
With the application of mixed position closed-loop system in the high-speed precise laser sub-marker, the response has been increased greatly and constant error has been decreased.
将混合位置闭环系统应用于高速精密激光内雕机中，大大提高了系统的响应性，减少了系统的稳态误差。
And selecting some elements closed to AD as a marker, which is also an important reference value to diagnosis of AD.
且选择某些与AD发生关系密切的元素作为标志物对诊断该病也有重要参考价值。
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