周期

• It will delay the start signal for six clock periods .
  它将起始信号延迟六个小时周期。
• Photoperiodic response is not restricted to flowering .
  可是，光周期反应不只限于开花。
• The resin moves intermittently down and out of the bed .
  树脂周期地向下移动和移出床层。
• The disease recurs in epidemic cycles at two-to three-year intervals .
  本病流行周期为2-3年。
• Business cycles are recurring cycles of economic events .
  商业周期是经济活动重复发生的周期。
• Seen from the earth, the sun rotates in about 27 days .
  从地球上观测，太阳的自转周期约为27天。
• The budgetary and the negotiating cycles were simply out of phase .
  预算的周期同谈判的周期简直不协调。
• Such readings can reveal longer－period deformations in the earth .
  这种读数可以反映地球长周期的形变。
• Lactation is the final phase of the reproductive cycle of mammals .
  泌乳是哺乳动物繁殖周期的最后阶段。