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- The electron microscopic observation revealed that sperm head plasmalemma and acrosome were the most cryosensitive. 电镜下观察发现，冷冻后精子质膜和顶体是冷冻损伤的主要部位。
- No more than sperm flagella, but in cycads and ginkgo head of the sperm head is still swimming. 精子多不具鞭毛，但在苏铁目和银杏目仍具游动的精子。
- Spermiogenesis of sperm head in soft-shelled turtle, Trionyx sinensis, was examined by transmission electron-microscopy. 摘要应用透射电镜技术详细研究了中华鳖精子头部形成过程的超微结构变化。
- To a certain degree, sperm head membrane maybe is the key factor to the androgenesis of the gynogenetic silver crucian carp eggs. 在某种程度上表明：精子膜蛋白可能是雌核发育银鲫卵子进行雄核发育的关键因素。
- She nestled her head on his shoulder. 她将头依偎在他的肩上。
- The male sperm fertilizes the female egg. 雄性的精子使雌性的卵子受精。
- The deer lowered its head to drink from the pond. 鹿低下头去喝池塘里的水。
- He gave the little boy a clout on the head. 他在那小男孩的头部打了一下。
- I saw the small girl topple over and hit her head. 我看见那小女孩栽了一跤，碰着了头。
- I was dazed by the blow on my head. 我的头挨了一击而觉得晕眩。
- She leaned her head back and whispered the news. 她向后仰着头，小声说出了这个消息。
- The horse kicked its fallen rider about the head. 那匹马乱踢从它背上掉下来的骑手的头部。
- A price of $1000 was set on the jewel thief's head. 悬赏1000美元抓住这个珠宝窃贼。
- As I was waiting for a bus a brick fell on my head. 当我在等公共汽车时，一块砖头落到了我的头上。
- He because of bashful but low head. 他因羞愧而低下了头。
- She greeted us with a nod of the head. 她向我们点点头打招呼。
- He was sitting with his head buried in a book. 他坐着埋头看书。
- He batted the idea around in his head. 他脑子里反复思考这个想法。
- How can I enlighten your wooden head? 我怎么才能让你这木头疙瘩开窍呢？
- The guilty man bowed his head in shame. 那个有罪的人羞愧地低下了头。
