The effect of root on soil respiration was observed mainly before repining stage with fluctuation.种有水稻,根系对土壤总的呼吸影响主要体现在成熟期之前,且有相互消长的现象.Cost price, nowaday value, time, fluctuation rate, un - venture gainings rate are imp...
A firm secures a needed commodity and is protected against price fluctuation.公司得到需要的商品,而且不会由于价格变动而受损失.The erratic fluctuation of market prices is in consequence of unstable economy.经济波动致使市场物价忽起忽落。Sometimes temporal fluct...