It is well known that there are twice failings of microspore wall called first and secondcontraction phases individually in the rice microspore development.
水稻的小孢子发育，通常都能看到有二次孢壁下陷过程，称之为第一和第二收缩期。
2
Second, U.S. businesses are poised to withstand contraction.
第二，美国企业可以平稳地抵住紧缩。
3
Figures released last week confirmed that the last half of 2008 saw the most savage contraction in demand for motor vehicles since the second world war.