SI

abbr 缩写 = International System (of units of measurement) (French Systeme International) 国际单位制（源自法文 Systeme International）: SI units 国际单位.

shush, shut, shut (sb) up, shut (sth) down, shut out, shut sb/oneself in (sth), shut sb/sth out (of sth), shut sth off, shut-down, shut-eye, shutter, shuttle, shuttle diplomacy, shuttle service, shuttlecock, shy, shy away from, shyly, shyness, shyster, Siamese, Siamese cat, Siamese twins, Siberia, Siberian, sibilant, sibling, sibyl, sibylline, sic, sick, sick of, sick-bay, sick-bed, sick-leave, sick-pay, sick-room, sicken, sickening, sickeningly,