one of the two male reproductive glands that produce spermatozoa and secrete androgens;
"she kicked him in the balls and got away"
例句
用作名词(n.)
Here is an embryonal carcinoma of the testis.睾丸胚胎癌，上方是正常的睾丸的边缘。
Here I reviewed the previous work on the gene expression patterns of human brain and testis, and proposed some potential suggestions for future research.本文对人睾丸和脑基因表达谱的研究进行了回顾，并提出了该研究方向今后的一些研究设想。
