查询词典 trivoltine

The the pupation peak of the univoltine groups and the bivoltine groups were obvious,but the trivoltine groups were not obvious.

一、二化性的种群化蛹盛期较明显，而三化性的种群则无明显的化蛹盛期。

Secondary production of major groups of macrozoobenthos in Lake Donghu was estimated from field data. The number of generaion, P/B coefficients and production of 9 dominant species were as follows: B. aeruginosa, univoltine, 91. 56g WW/m〓. yr, 0.64; S. lacustre, univoltine, 43. 02g WW/m〓. yr, 3. 55; B. sowerbyi, univoltine, 11. 39g WW/m〓. yr, 4. 15; L. hoffmesteri, trivoltine, 7. 09 g WW/m〓. yr, 11. 9; P. choreus, bivoltine, 5. 03g WW/m〓. yr, 10.33; Ch. plumosus, bivoltine, 3. 37g WW/m〓. yr, 9. 10; T. chinensis, univoltine, 3. 76g WW/m〓. yr, 4. 49; T. akamusi, univoltine, 44. 60g WW/m〓. yr, 4. 60; Clinotanypus sugiyamai, univoltine, 0.48g WW/m〓.

较系统地研究了东湖底栖动物九种优势种的生活史、P／B系数和生产量，其结果如下：铜锈环棱螺：一年一代，生产量为91.56g WW／m〓。yr，P／B系数0.64；湖球蚬：一年一代，43.02g WW／m〓。yr，3.55；苏氏尾鳃蚓：一年一代，11.39g WW／m〓。yr，4.15；霍甫水丝蚓：一年三代，7.09 g WW／m〓。yr，11.9；花翅前突摇蚊：一年两代，5.03g WW／m〓。yr，10.33；羽摇蚊：一年二代，3.37g WW／m〓。yr，9.10；中国长足摇蚊：一年一代，3.76g WW／m〓。yr，4.49；大红德永摇蚊：一年一代，44.60gWW／m〓。yr，4.60；褐斑菱跗摇蚊：一年一代，0.48g WW／m〓。yr，7.59。

This series is strongly recommended for use in order to improve trivoltine deg-ree of water pump.

本系列为提高水泵产品的三化程度，谨向用户推荐优先选择使用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。