s/he

剑桥词典

used in writing instead of "she or he" to refer to a person whose sex is not known
（在書麪語中代替 she or he，表示某人性別未知）他或她
If any employee needs to take time off, s/he should contact the Personnel Department. 任何雇員需要休假，應與人事部聯系。
也見
they 返回 s/he