641. on the sly (=secretly) 偷偷地

640. know sb. by sight 与…只面熟

639. (be)in sight (=in view, visible) 看得见 out of sight 看不见

638. at the sight of 一看见…

637. catch the sight of (=see for a moment)瞥见

636. take the side of 站在…一边

635. at the side of 与…相比

634. be shy of 难为情, 不好意思

633. be short of (=lacking enough)缺乏,不够

632. in short supply 供应不足