631. in short (=in a few words, in brief)简称
632. in short supply 供应不足
633. be short of (=lacking enough)缺乏,不够
634. be shy of 难为情, 不好意思
635. at the side of 与…相比
636. take the side of 站在…一边
637. catch the sight of (=see for a ;moment)瞥见
638. at the sight of 一看见…
639. (be)in sight (=in view, visible) 看得见
out of sight 看不见
640. know sb. by sight 与…只面熟