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- The new airplane flies at twice the speed of sound. 这架新型飞机以两倍于音速的速度飞行。
- Bills travel through the mail at twice as fast as checks. 帐单的邮寄速度是支票的两倍。
- If a plane is flying at Mach 2, it is flying at twice the speed of sound. 假如飞机以二马赫的速度飞行，那么它的速度就是音速的两倍。
- If a plane is flying at Mach 2,it is flying at twice the speed of sound. 假如飞机以二马赫的速度飞行，那么它的速度就是音速的两倍。
- Physically, the filament minutely heats up and cools down at twice the line rate, due to AC applied to the filament. 实际上，由于加载在灯丝上的交流电，灯丝基本上是以两倍市电频率加热或冷却。
- Purkinje fibers are driven ("over driven") by the sinus node at twice their intrinsic rate. 浦氏纤维是被较其本身频率约高一倍的窦房结所驱动（“超速驱动”）。
- Arctic temperatures are rising at twice the global average and could rise seven degrees centigrade by 2100. 北极正在以2倍于全球平均气温上升的速度快速升温。到2100年，北极有可能上升7摄氏度。
- Chris Wood, a strategist at CLSA, predicts that emerging Asia's forward p/e ratio will peak at twice America's. CLSA的策略分析师ChrisWood预测，下一步亚洲新兴市场的市盈率峰值将为美国市场的两倍。
- Where is the swelling?Being shot is like getting hit by a hammer, but at twice the speed of sound. 也没有看到肿胀，因为枪伤的伤口会像被一个二倍音速的榔头敲打过一样。
- The filters are usually degraded by the spurious response at twice the passband frequency. 但滤波器受倍频响应所影响。
- Tall, thin and diffident around the edges, he speaks at twice normal speed, often inserting parenthetical commentary on his thoughts as he gallops ahead. 他个子很高，不过很瘦，说话比正常语速快一倍，谈话的时候经常 会插进一些自己的评论。
- Women have served all these centuries as looking-glasses possessing the magic and delicious power of reflecting the figure of a man at twice its natural size. 这么多世纪以来,妇女一直都在为男人服务。她们拥有这种魔力:可以把男人的形象放大一倍。
- Patients in LCAH were treated by conventional radiotherapy with 40Gy,then by LCAH to the total dose of 70Gy(a fraction of 1.5Gy at twice daily,5 days per week). LCAH组常规放射治疗40Gy后;改用后程加速超分割推量治疗;1.;5Gy次/;2次/天;5天/周;总剂量至70Gy。
- Bubbles will get bigger before they burst.Chris Wood, a strategist at CLSA, predicts that emerging Asia's forward p/e ratio will peak at twice America's. 就像美联储之前调低利率，以助涨互联网和美国房产泡沫一样，明年继续放松流动性能继续加大新兴市场通胀。
- According to the Canadian Institute for Health Information,prescription drug costs have risen since 1997 at twice the rate of overall health care spending. 根据加拿大健康信息研究所的消息，从1997年开始，处方药物上的花费增长超过了所有健康护理消费的两倍。
- We should brush our teeth at least twice a day. 我们每天应该至少刷两次牙。
- He has been there at least twice. 他至少去过那儿两次。
- He arrived at the meeting place beforehand. 他提前到达会面地点。
- It is necessary that he be sent there at once. 有必要马上派他到那里去。
- She is always so surly; she never smiles at anyone. 她总是那麽个坏脾气，对谁也没有一个笑脸。
