speck

• I looked away down stream, and saw a black speck on the water .
  我向下游远远的望了一下，看见水面上漂着一个黑点。
• If the energy of the speck could be measured, the energy of the molecule could be inferred .
  如果微粒的能量可被测得，就可以推算出分子的能量。
• In 1 second, the impacts of the molecules against the speck would be nearly equal in all directions .
  在一秒钟内，分子从各个方向对微粒的撞击将几乎相等。
• On this scale the moon would be scarcely more than a dust speck about 1cm from the sand grain .
  照这样的比例尺度，月球将是仅离小沙粒一厘米远的一颗尘埃微粒。
• The water rat, paralysed and string, saw at last a distant speck on the white surface of the road .
  水老鼠神思恍惚，木然远望，终于看见一个小斑点出现在远方洁白的路面上。
• The enterprise planes, mere specks in the sky, were heading back to the carrier, barely visible to the north .
  “企业号”上的机群正飞回航空母舰，隐隐只见北方天际星星点点。
• The particle of sand representing the sun would be one million times larger than the speck of dust standing in for the earth .
  代表太阳的沙粒要比代表地球的微尘大一百万倍。
• I have definitely seen this floating speck before
  我之前肯定是见过这个漂浮物
• We had an umbrella to keep specks of dust off us
  我们还打了把伞，用来挡灰。 ”
• There wasn ' t a speck of truth in what he told us
  他对我说的没有一点儿是真的。