| 释义 |
Y LETTER plural Y's or Ysy plural y's or ys waIn [C] the 25th letter of the English alphabet英语的第25个字母A Y-chromosome is a sex CHROMOSOME that exists only in male cells.Y染色体If a Y-chromosome combines with an X-chromosome during fertilization, a male baby will result.若一条Y染色体在授精过程中与一条X染色体结合，就会产生一个男婴。(Br trademark) Y-fronts are a piece of underwear for men and boys, covering the area between the waist and the tops of the legs, which have an opening at the front which is the shape of an upside-downY (前部呈倒写的Y形的)男子三角裤，男短裤
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