用法:
1 [U] (fml 文) action of obtruding 强行加入; 闯入:
the obtrusion of unwelcome guests 不速之客的闯入.

用法:
2 [C] thing that obtrudes 强加的事物:
unwelcome obtrusions 强加的令人不快的事物.

• stroke
• strong
• structure
• struggle
• studio
• study
• stuff
• stumble
• stupid
• style
• subject
• submerge
• submit
• subsequent
• substance
• substantial
• substitute
• subtract
• suburb
• subway
• succeed
• success
• successful
• succession
• successive