cause concern短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 提起注意 The U.S. government has insisted there's not enough difference between the genetically modified seeds its agencies have approved and natural seeds to cause concern. 美国政府坚持称相关机构审批的转基因种子和自然种子没什么区别,不必就此担心。 yeeyan What symptoms is the patient exhibiting which cause concern? 是什么症状的病人表现出令人关注? blog.sina.com.cn