a variety of

• A variety of circumstances had prevented his marrying .
  由于种种原因，他的婚事耽搁了下来。
• Penetrating injury may be due to any of a variety of weapons .
  任何一种武器均能造成穿透伤。
• A variety of cyclopropanes are thus produced in good yield .
  从而以高收率得到带各种环丙烷。
• The throat and mouth support a variety of microorganisms .
  咽喉与口腔中也存在着许多微生物。
• Members of congress represents a variety of denominations .
  国会议员分别属于各种各样的教派。
• The above theory has come under fire from a variety of directions .
  上述理论曾受到各方的责难。
• Information on nuclear radius comes from a variety of sources .
  关于原子核半径的知识有各种来源。
• A variety of dilute mineral acids are used to extract the anions .
  用各种稀的无机酸来萃取阴离子。
• Creosote thus possesses a variety of advantageous properties .
  这样，防腐油就具有各种很好的性能。
• This inactivation may be accomplished in a variety of ways。
  这种失去活性作用能以多种方式来实现。