sit in

列席，旁听

sinus, sinusitis, sip, siphon, sir, sire, siren, sirloin, sirocco, sirup, sisal, sissy (also cissy), sister, sister-in-law, sisterhood, sisterly, sit, sit down, sit down on, sit for, sit on, sit up, sit up (and take notice), sit-down, sit-in, sitar, sitcom, site, sitter, sitting, sitting member, sitting tenant, sitting-room, situate, situated, situation, situation comedy, situational, six, six-footer,