I trim my nails once a week.
我每周修剪一次指甲。
Can you trim my beard a little shorter on the sides?
能帮我把胡子两侧修剪短一点吗?
"trim"=稍微修剪整齐(指甲、胡子、发梢);大幅剪短是 "cut";指甲刀是 "nail clippers"。