衰退期

The results showed that Liquidamba formosana, Quercus acutissima, and Quercus fabri populations had the dominant positions in the forest community of Purple Mountain Area of Nanjing. During the growth process, the mortality of L. formosana, Q. acutissima, and Q. fabri were higher in low age. After entering into the middle-age stage, the upper space was occupied by oak and L. formosana population all died. The mortality of Q. acutissima and Q. fabri populations were increased with the increasing of diameter class. L. formosana population in the Purple Mountain Area of Nanjing belonged to be the typical growing population and Q. acutissima population was a decreasing population. Q. fabri population belonged to be the growing population on the whole, but the diameter class in middle parts was incomplete and the population was difficult to be renewed. Among the studied quadrate, only one dominant population showed an aggregated distribution and other dominant species showed the random distribution. Either, all the dominant species in all the quadrates presented random distribution.

结果表明，枫香种群、麻栎种群和白栎种群在南京紫金山地区森林群落中占有优势地位；枫香种群、麻栎种群和白栎种群在其生长过程中，在低龄时期，死亡率都较高，进入中龄期后，由于上层空间都被栎木占据，枫香种群全部死亡，而麻栎种群和白栎种群的死亡率则随着径级的增大而增大；南京紫金山地区枫香种群属于典型的增长型种群，麻栎种群属于衰退型种群，白栎种群总体上属于增长型群落，但中间径级不完整，种群更新较为困难；在所研究的每一个样方中，一般只有一个优势物种呈聚集分布，而其他优势物种呈随机分布，或样方中所有优势物种都呈随机分布。

As during the 1990-91 economic slump,"Anybody who retrenches because of the recession has really got his head in the sand."

就像在1990年-1991年的经济萧条期，&那些一看到衰退就想到节省开支的人无疑就是把头埋在沙子里的鸵鸟。&

As during the 1990-91 economic slump,"Anybody who retrenches because of the recession has really got his head in the sand."

1990年-1991年的经济萧条期，&那些一看到衰退就想到节省开支的人无疑就是把头埋在沙子里的鸵鸟。&

The combination of heavy debt burden, financial market strain, high interest rates and industrial recession throughout the world are more than enough to snuff out the feeble falterings at recovery in the British economy.

世界范围的沉重的债务，紧缩的金融市场，高昂的利率以及工业的衰退等等，所有这一切足以一笔勾销处在恢复期的英国经济的虚弱无力的回升。

Head volume,index of bud self compatibility and plant growth vigor exhibited significant ...

花球大小、蕾期亲和指数、生长势等方面表现明显的自交衰退。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。