它是雄的还是雌的？
袋鼠雌袋鼠在植物繁殖力充足的时候生育后代是有利的。
It is advantageous for a kangaroo female to produce young at a time when plant productivity is sufficient to support her offspring.
此外，大部分雌苏铁球果的结构似乎与风直接授粉不一致。
Furthermore, the structure of most female cycad cones seems inconsistent with direct pollination by wind.
这些有毒物质会限制毛毛虫的生长，减少雌蛾产卵的数量。
These noxious substances limit caterpillars' growth and reduce the number of eggs that female moths lay.
在滞育期间，小袋鼠呆在雌袋鼠的育儿袋里，因而推迟了子宫内第二个受精卵的发育。
During diapause, a young kangaroo stays in the female's pouch and growth of a second fertilized egg inside the uterus is delayed.
然而，到了第12天，当它们长到3厘米长时，就会有成百上千微小的卵在雌蛙的身体下部形成。
By the twelfth day, however, when they are about 3 centimetre long, hundreds of tiny eggs form on the underbodies of the females.
他们看到，如果雌鱼吃了对虾——即使是在这个陌生的实验室环境中——雄性裂唇鱼也会惩罚或驱赶雌鱼。
They saw that the male cleaner fish — even in this unfamiliar lab setting — would punish or chase away the female fish if the females ate a prawn.
雌章鱼会。
雌蝴蝶在植物的叶片上产卵。
用组织学方法初步研究了罗氏沼虾雌体腹肢外骨骼的结构。
The exoskeleton structure of female pleopod in Macrobrachium rosenbergii was primarily investigated by histological method.
在相同温度下，产卵雌虫的发育时间比非产卵雌虫的长。
The development time of ovigerous females was longer than that of non-ovigerous females at same temperature.
通过观察青蒿琥酯对曼氏血吸虫雌虫产卵的影响，分析药物的抗生殖作用。
Study the anti-fecundity effect of artesunate against the schistosoma mansoni by observation and analysis of the parasite egg laying.
他的肉身代表了生命的雄雌两方面。
雌蚊还会通过光线来寻找血液。
删除单个基因使雌鼠像男鼠。
在经过的时候，雌猩猩和小猩猩盯着我。
雌鼠们表现出明显的偏好。
而对雌老鼠而言，却不会发生这种适应性。
雄蚊和雌蚊都是以植物汁液和其他甜食为食。
Male and female mosquitoes alike get their nourishment from plant nectar and other sugar sources.
这种品种的雌蜘蛛有一个相当有趣的孵卵方法。
The female of this species has a rather interesting technique for incubating her eggs.
只有雌蚊吸食血液。
皮乔托说她的团队正在雌鼠上重复该实验。
Picciotto says her group is repeating the experiments on female mice.
这些雄鼠可以补偿这一事实：它们对雌鼠吸引力不够。
The males may be compensating for the fact that they're less attractive to females.
这些雄鼠可以补偿这一事实：它们对雌鼠吸引力不够。
The males may be compensating for the fact that they're less attractive to females.
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