situational

a.环境形成的

sit down on, sit for, sit in, 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, six, six-footer, six-pack, six-shooter, sixfold, sixpence, sixpenny, sixteen, sixteenth, sixth, sixth-former, sixthly, sixtieth, sixty, sizable, size, size up, sizeable (also sizable), sizing, sizzle,