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Dendroctonus valens LeConte was recently found in outbreak in China. Its elder instars and mature larvae mainly over-winter under the roots of the pine stumps and standing trees in China.

红脂大小蠹Dendroctonus valens LeConte (Red turpentine beetle， RTB)是近年来在中国爆发的入侵生物，在我国主要以老熟幼虫在油松伐桩和立木的根部越冬。

The effects of fenvalerate, phoxim and their mixture at about doses of LD〓 separately on the larva with 4 instars of cotton bollworm in development, spermatogenesis, spermateliosis and male mesoblast gonad were studied with micro-application method.

以毛细管点滴法，分别研究了约LD50剂量的氰戊菊酯、辛硫磷及其混剂对棉铃虫4龄初期幼虫的生长发育、精子发生与形成以及雄性中胚层生殖腺的影响。

This paper states the biology characteristics of moon silkworm through rearing in room and microcharacters of its egg hole through scanning electron microscope , and its instar has four moulting and five stadiums, divoltinism, diapause with pupa and forty days of all instars in Hefei.

通过扫描电子显微镜观察了柳蚕卵孔的显微特征，对其形态进行了描述，并与其它野蚕进行了比较。

The attraction of fecal volatile of oriental migratory locust Locusta migratoria manilensis produced in different instars for the aggregation of its nymphs was preliminarily studied,by applying self-made olfactometer and relative installations.

初步研究了东亚飞蝗Locusta migratoria manilensis (Meyen不同龄期蝗虫粪便挥发物对蝗蝻的聚集作用。

The cause of aggregation was because of mass oviposition behaviour of adults. Aggregate intensity of larvae in late instars decreased and larvae dispersed gradually.

空间图式的研究，可以揭示种群的空间结构以及种群下结构的状况，无论在理论生态学方面还是应用方面都十分重要 [1 ]。

The results showed that there were two generations in one year, and there were 6~8 instars in duration of larvae's development. Larvae over-winters under bark or in base of tree. Adult were phototaxis and active on night.

结果表明：该虫在吴旗县一年发生2代，以幼虫在粗皮下或树基越冬，幼虫6~8龄，具吐丝下垂习性，在阴坡立木被害重于阳坡，成虫夜间活动，有趋光性。

The age structure of striped stem borer, Chilo suppressalis, overwintering in different type of rice fields and wild rice fields was investigated, and post winter feeding and pupation dynamics were compared among larvae in different instars.

调查了不同类型稻田及茭白田中二化螟的越冬年龄结构，比较了不同龄期幼虫之间在冬后取食与化蛹动态方面的差异。结果表明，越冬虫龄以双季晚稻田中明显较低，中稻田与茭白田中相对较高。

The mine length of third instars was 5.1- and 2.9-fold longer than that of first and second instars, respectively.

第三龄幼虫之取食隧道长度各为第一与第二龄幼虫之 5.1 与 2.9 倍。

The ovarian development could be divided into five instars. In different instars, the morphology and structure of ovary was different.

隆线溞孤雌溞的卵巢发育要经历五个幼龄期，不同的龄期，卵巢的形态结构不同。

Spatial heterogeneity of the eggs and adults in higher density, adults in lower density were caused by random factors, but spatial variability of the 2~4 instars nymphs in the higher density, and of the eggs and 2~4 instars nymphs in the lower density were spatially autocorrelated.

在高密度下卵和成虫及低密度下成虫的空间异质性是由随机因素引起，而高密度下2~4龄若虫及低密度下卵和2~4龄若虫的空间异质性是由空间的自相关因素引起。

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。