dirt指脏东西（泥土,污垢等）,dust强调的是一很薄的一层（团）脏东西.当脏东西时,dirt,dust可以通用The table is covered in dirt/dust当强调一层（团）脏东西时,用dust为宜,The truck left with dust behind.
dirt指脏东西（泥土,污垢等）,dust强调的是一很薄的一层（团）脏东西.当脏东西时,dirt,dust可以通用The table is covered in dirt/dust当强调一层（团）脏东西时,用dust为宜,The truck left with dust behind.
