dissipation region
(1)耗散区域，弥散区域
(2)散射范围

• switchgear
• switch-in
• switching algebra
• switching angle
• switching-off
• switching-on
• switching-out
• switch(ing)-over
• switching time
• switch value
• swiveling
• swivel slide
• swivel table
• sylvaine
• sylvatron
• symbol
• symbolic code
• symbolism
• symcenter
• symmetric(al)
• symmetrical
• symmetrical all-dielectric interference filter
• symmetrical astigmatism
• symmetrical camera lens
• symmetrical combination of films