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- miles per hour per second 英里/小时/秒
- Here we need to distinguish between dimensions (like speed) and units, the specific things we measure with (like miles per hour or meters per second). 我们需要分清楚量纲(比如速度)和单位(我们用来衡量事物的尺度,比如每小时英里数或者每秒米数)。
- The combined image unveils a bubble-shaped shroud of gas and dust that is 14 light years wide and is expanding at 4 million miles per hour (2,000 kilometers per second). 合成图揭示了气体和尘埃组成的泡状覆盖物，宽14光年，以每秒400万英里（每秒2000公里）的速度膨胀。
- They found that cannonballs shot at the highest velocity possible in the 19th century (about 1,100 miles per hour or 500 meters per second) did relatively little damage. 他们发现，炮弹射击的最高速度可能在19世纪（约1100英里每小时或500米每秒）没有太大破坏。
- The speed of sound in air at ordinary temperatures is about 1,100 feet per second,which is about one mile in five seconds or about 700 miles per hour. 声音在空气中的速度在常温下约为每秒1100英尺，即大约每5秒1英里或者大约每小时700荚里。
- But cannonballs shot at the lowest 19th century velocity (about 225 miles per hour or 100 meters per second) gave the wood enough time to bend, splinter, and burst, causing massive damage. 但是炮弹射击最低19世纪的速度（大约225英里每小时或每秒100米）给予足够的时间来木材弯曲，分裂，并爆裂，造成大规模的破坏。
- The 4,300-pound satellite collected the image at noon EDT on Oct. 7 while moving from the north pole to the south pole in a 423-mile-high orbit at 17,000 miles per hour, or 4.5 miles per second. 这颗重4，300磅的超级卫星在美国东部时间十月七日中午，以每小时17，000英里也就是每秒4.;5英里的速度，在423英里轨道高度飞行时拍摄下这张图片。
- The speed of sound in air at ordinary temperatures is about 1, 100 feet per second, which is about one mile in five seconds or about 700 miles per hour. 声音在空气中的速度在常温下约为每秒1100英尺，即大约每5秒1英里或者大约每小时700荚里。
- Can your car make a hundred miles per hour? 你的汽车一小时能开一百英里吗?
- It travels thousands of miles per second. 它一秒钟能走几千英里。
- The hurricane has a speed of 73 miles per hour. 飓风每小时73英里。
- The speed limit is 40 miles per hour. 规定的最高时速为40英里。
- The cruiser's speed is 50 miles per hour. 巡洋舰的速度每小时有50海里。
- The truck was traveling under fifty miles per hour. 那辆卡车以每小时不到五十英里的速度行驶着。
- The velocity of light is about 186,000 miles per second. 光速大约是每秒十八万六千英里。
- We were bowling along (the motorway) at seventy miles per hour. 我们以每小时七十英里的速度(在高速公路上)飞驰。
- The maximum speed of this car is 150 miles per hour. 这辆车的最大时速为一百五十英里。
- Cars cannot exceed35 miles per hour within city limits. 在市区线以内车速不能超过每小时35英里
- It travels thousands of miles per second . 它一秒钟能走几千英里。
- The odometer shows now 140 miles per hour. 里程表显示现在的时速为140英里。
