clean-up
(1)净化
(2)精炼
(3)整理
(4)清除

• swelling effect
• swept-focus
• swing
• swing arm
• swing back
• swing cam
• swing-in-mirror
• swing wedge
• swirl
• switch
• switch board
• switch box
• switch capsule
• switcher
• switchgear
• switch-in
• switching algebra
• switching angle
• switching-off
• switching-on
• switching-out
• switch(ing)-over
• switching time
• switch value
• swiveling