您要查找的是不是：
- The copulation is a serious business. 房事成了严重的问题
- The woman therefore at one copulation conceived. 她于是由他怀了孕。
- He then made the action of copulation and broke the big stone. 说著就做出交媾的动作，把石头弄破。
- The male organ of copulation in certain invertebrates. 雄性生殖器官某些无脊椎动物的雄性生殖器官
- After the copulation duration, they die at once, despite of copulation or not. 雄蚁生下来的目的，纯为了与蚁后交配，只要交配期一过，不论任务达成与否，就会立刻死亡。
- The copulation had no influence on release and storage of sperm bundles. 交配对精子束的释放和贮存无影响。
- The reproductive system has a complex innervation concerned in copulation and oviposition. 生殖系统有一个同交尾和产卵有关的复杂神经系统。
- We focused on several key events during fertilization from membrane fusion to karyogamy of sperm cells and egg cells. 探讨了从精细胞和卵细胞质膜融合到它们的核融合完成这一发育阶段的某些主要事件。
- Someone who engages in anal copulation (especially a male who engages in anal copulation with another male). 进行肛门性交的人（特别是两个男同性恋者之间的肛交）。
- Deterministic behavior models on copulation, spawning and environmental selection of artificial fish are built. 建立了人工鱼产生交配欲望、产卵和环境选择等预定义行为的认知模型。
- Karyogamy The fusion of two nuclei that exist within a common cytoplasm, as occurs in the formation of the zygote from two gametes. 核配：同一个细胞中两个核之间的融合现象称为核配，核配发生在两个配子结合成合子的过程中。
- "The copulation option is far more likel, and would make this the oldest representation ever of a pornographic scene. 而做爱的可能性更大,(如果这一看法属实),它将是世界上已出土的最古老的色情场面。"
- Bonobos go the furthest in same-sex bonding with regular copulation among males. 倭黑猩猩在同性关系方面步子迈得更大，他们雄性之间经常交媾。
- The researchers say the females may have died of stress caused by aggressive male copulation attempts. 对此，研究人员表示，雌性蜥蜴可能是由于雄性蜥蜴富有侵略性的交配行为对其产生了巨大的压力而死亡的。
- Some male placoderm fossils show evidence of “graspers” that held the female fish during copulation. 一些雄性盾皮鱼化石显示出在交配期间用来抓住雌鱼的“紧握器”的证据。
- The writer chained for life to the routine of a wage slave and the ritual of copulation. 作家的一生都被为钱卖命的不变常规和交配仪式牢牢拴住。
- In fact, there's no evidence that the birth rate ever fell because people were too smelly for copulation. 说实话，从来没有证据表明人太臭无法进行性交从而导致出生率降低。
- Results Oncomelania hupensis hupensis s copulation behavior included calling and mating. 结果钉螺的交配行为可分为觅偶和求偶2个阶段;
- This is the law of him that hath the issue of seed, and that is defiled by copulation. 这是有关因淋病，或遗精沾染不洁的人，
