1. sift v.t.?????? (guo4 lu4)???: Every week I sift through my mail to see if there is anything for me other than bills and junk.(????????????????????????????????????????????????????????????????????????????????????)2. sustain v.i. /v.t.?????? (cheng2 shou4)???: I can run 5km pretty quickly, but I can not sustain that pace.(??????????????????????????????????????????????????????????????????)3. critici