因为电动马达的最大力矩处于零速度。
Because the most torque an electric motor has is at zero speed.
也许是这里零速度，释放，也许给它一个初速度。
Maybe it's just that I release it here; with zero speed; maybe I give it a little speed.
要求此电源能输出任意形状的矩形波，交流正负极性比率可任意调节，交流过零速度极快。
Rectangular wave of arbitrary shape shall be output, change rate of AC plus-minus shall be regulated arbitrarily, and the speed of exchanges over zero shall be very quick.
然后采用将零速度法和广义虚像法相结合的方法来处理自由边界，并在自由边界上采用四阶精度差分格式；
Second, the free-boundary is handled by using combination of the zero-velocity method with the general ghost-image method and fourth-order difference format is used in free-boundary.
对流单体受到超折射污染时，零速度线所在区域多普勒通道可采用中等级抑制，监测通道可采用强等级杂波抑制。
The medium level suppression in the Doppler channel and high level suppression in the Surveillance channel can be invoked when convective precipitation cells are contaminated.
它们以每年超过60英尺的速度向内地迁移，融入了热带稀树大草原的丰富草地和零星的树木。
As they travel inland at speeds in excess of 60 feet a year, they merge with the rich grass and scattered trees of the savanna.
在9分钟内，探测器必须将速度从每小时2万公里降至零，从火星上空125公里处着陆。
In nine minutes, the probe had to reduce its speed from 20,000 km per hour to zero, landing from 125 km above Mars.
我们期望这些零售商为我们提供更优的价格，更好的服务和更快的邮递速度，以及一切让我们感到满意的事情。
We expect all these retailers to compete on price and customer service, to deliver quickly, to take returns, and to do whatever it takes to satisfy us.
他更倾向于看城市家庭消费水平。城市家庭消费水平，不会像零售业那般快速增长，但，同样地，在以每年8 ~ 16%的速度递增，远远高于其他一些国家。
He prefers to look at urban household consumption, which may not be growing as fast as retail sales but is still ticking up at 8% to 16% per year, far better than in other countries.
提高交付你的体验的速度是关键，因为在零售业，你有6到9个月时间来改变任何东西。
The increased speed of delivery you experience is key because, in the retail sector you get a 6 to 9 month window to change anything.
但是将石墨单原子层冷却到接近绝对零度时，不可思议的事情发生了：电子的速度得到显著增加。
But cool this graphene down to near absolute zero and something extraordinary happens: the electrons speed up dramatically.
只要韩国银行想以比零星存款更快的速度增加贷款，这种银行就要依赖向外借贷来弥补亏空。
Whenever a South Korean bank wants to expand its loan book faster than its retail deposits, it relies on foreign borrowing to fill the gap.
根据国际购物中心理事会的数据，在过去的一年里，开张一年以上的沃尔玛零售店的收入以平均每季度0.75%的速度减少。
Over the last year, revenue at Wal-Mart stores open at least a year has fallen by an average 0.75 percent each quarter, according to the International Council of Shopping Centers.
在北美，丰田则通过取消加班生产，减缓了生产速度，以保存零部件。
In North America, Toyota slowed production by canceling overtime shifts to conserve parts.
我来解释一下，整个跳楼过程中，跳楼者的速度（由此便产生了动能）在起跳处和着地处都为零。
Just to be clear, the jumper velocity (and thus kinetic energy) of the jumper at the top and the bottom are both zero.
但是随着长效锂离子电池的技术突破，驾驶高速度的零排放汽车可能不再是好莱坞明星的专利了。
But after technological breakthroughs in the development of long-lasting lithium-ion batteries, soon it may not just be Hollywood stars who are zipping around in zero-emission automobiles.
加速度才为零,写出来就是：我给它的力,与重力之合力等于零。
Only now is there no acceleration so I can write down that force of Walter Lewin plus the force of gravity equals zero.
物体无加速度地，悬挂在此，合力为零，加速度亦为零。
This object is hanging there, it's not being accelerated so the net acceleration must be zero.
美国哪三座城市人们的动作最快？——心理学家通过观察银行出纳员找零钱的动作、行人的步伐速度和邮电行业工作人员的说话速度，判定人们动作最快的三座城市是：波斯顿、水牛城和纽约。
By observing how quickly bank tellers made change, pedestrians walked, and postal clerks spoke, psychologists determined that the three fastest-paced U.S. cities are Boston, Buffalo, and New York.
废弃的卫星、航天器脱落的油漆颗粒、星箭分离脱落的零件碎片，这些太空垃圾以每小时几千公里的速度环绕地球急速飞行。
Old satellites, chips of paint and jettisoned rocket stages arehurtling around the world at thousands of kilometres an hour.
这弓有很大的速度和零噪音或振动。
总部与零售店之间使用低带宽网络速度。
近日，作为一款零排放的超级摩托车在美国犹他州的博纳维尔盐滩以150mph的恐怖速度刷新了世界记录。
Mission Motors‘ emission-free superbike recently shattered the world land speed record for electric motorcycles as it clocked in a series of scorching 150mph runs at Utah’s Bonneville Salt Flats.
近日，作为一款零排放的超级摩托车在美国犹他州的博纳维尔盐滩以150mph的恐怖速度刷新了世界记录。
Mission Motors‘ emission-free superbike recently shattered the world land speed record for electric motorcycles as it clocked in a series of scorching 150mph runs at Utah’s Bonneville Salt Flats.
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