a. 单身的, 单程的, 单一的, 个别的, 孤独的, 专一的

n. 一个, 单打, 单程票

vt. 选出

vi. 击出一垒打

[计] 单精度型

n. a base hit on which the batter stops safely at first base

v. hit a single

a. used of flowers having usually only one row or whorl of petals

a. existing alone or consisting of one entity or part or aspect or individual