humming bird造句

• Humming bird beats his wings almost 100 times per second .
  蜂鸟每秒钟拍动翅膀近100次。
• The wingbeats of humming birds are so rapid that their wings cannot be seen distinctly
  蜂鸟的翅膀拍击的速度很快，以至于人们不能清楚地看到它们的翅膀。
• In 1945 c . j . ghu turned his attention to rotorcraft and designed a co - axial helicopter , known as the humming bird model a
  1945年，朱家仁先生制造了一架共轴双旋翼直升机，即蜂鸟一号。
• During the tie - down test , the ground screw came off with the rope , the humming bird tipped over and both its rotors were broken
  在地面系留试验中，地面人员不慎脱手，该机翻倒在地面，两套旋翼都折断了。
• They are just a few among the many species of migratory birds , including the humming bird , which are proven great voyagers with strong survival skills
  它们跟蜂鸟一样同属季候鸟，不但是伟大的旅行家，而且拥有过人的求生本领。