1、

Standing in a long queue at a taxi rank outside the Opera Garnier, one irate Parisian watched a string of cabs with the red "taken" light on their roof drive past, and exclaimed: "Taxis, taxis all around, but where's one when you need one."

在卡尼尔歌剧院外,一个出租车站排起了长队,一位愤怒的巴黎人看着一连串的出租车车顶亮着“有人”的红灯呼啸而过时,大声抱怨道:“出租车,到处是出租车,但是你需要时却一辆也没有。”

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2、

The main circuit used SEPIC topology and pulse constant current drive mode. It has PWM dimming function and is suitable for driving high power LED lamp string.

该电路主电路采用sepic拓扑,脉冲恒流的驱动方式,具有脉冲频率调制(PFM)和脉冲宽度调制(PWM)调光等功能,适合驱动大功率LED灯串。

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3、

The feature of the progressive cavity pump mobile intermittent recovery technique is using a tractor as power unit, adopting a double universal coupling transmitting the power to a drive head to make the rod string rotate and thereby drive the progressive cavity pump for pumping.

新开发的螺杆泵机动间歇采油技术及设备的主要特征是用拖拉机做动力源,用双万向联轴器把动力传递给驱动头,由驱动头带动抽油杆柱旋转,进而驱动螺杆泵旋转抽油。

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