at a speed of 以……的速度:
He drove at a speed of 35 miles an hour. 他以每小時35英里的速度駕車行駛。
Light travels at a speed of about 186,282 miles (299,728 kilometers) per second. 光速是每秒大約186,282英里(299,728公里)。
【注】at a speed of後通常接速度的具體數值,比較下面at the speed of的用法。如:
Can the plane fly at the speed of sound? 這飛機能以音速飛行嗎?
注意,下面一句中的at並不表示速度,而是表示“對……”:
The doctors were astonished at the speed of her recovery. 醫生對她恢復的速度感到驚訝
at the speed of 釋義:
以……速度
例句:
Even if ET has mastered building a rocket that can travel at the speed of light, he may be lying dead inside a weakened craft .
即使外星人已經掌握了製造一枚能以光速飛行的火箭的技術,他也可能死在了一架飛船裡。
at a speed of釋義:
以…的速度
例句:
The car travels at a speed of 80 miles an hour.
小汽車以每小時80英里的速度行駛。