611. on sale (=offered to be sold) 出售, 上市

610. be for sale 待售

609. for the sake of ( =for the good or advantage of ) 为了…起见

608. in safety 安全地

607. rule out (=exclude, eliminate) 排除

606. run(take)risk of (=do sth dangerous)的风险

605. at the risk of(=with danger of)冒...的风险

604. give rise to (=lead to) 引起, 导致

603. be within one’s rights(to do) 有权(做)

602.be in the right正确的;in the wrong错误的