be directed at短语⁹⁰⁸⁸⁷⁺⁷ 基本例句 被用来 All tests should on ly be directed at market inefficiency, not market efficiency. 所有的有效性检验只能检验市场无效，而不能证明其已经达到有效。 dictall Method Make use of statistics and management science be directed at go on standardize on the locale evaluation. 方法利用统计学、管理学的方法对现场评价进行规范。 chemyq