She focused on improving the accuracy of her lay-ups during practice.

lay-ups 是名词短语，由动词短语 lay up（放置、储存）加连字符和复数后缀 -s 构成。在篮球术语中，lay-up 指"上篮"，即球员在跑动中将球轻轻投向篮筐的投篮方式。