■ means

单复数同形。

• a means of storing power储存能量的办法
• means of production生产资料。

• -ache
• ache
• acquaint
• acquaintance
• across from
• across...from
• across... from..., across from..., from across...
• act
• action
• active
• actually
• act 与 action
• A. D.
• ad
• adapt
• add
• address
• admire
• admission
• admission 与 admittance
• admit
• admittance
• adopted
• adore
• adventure