touch on
... take in接受,吸收;了解,理解 touch on关系到,涉及 turn to变成;求助于,借助于 ...
concern
... valuable 有价值的;珍贵物品 concern 关心;关系到;公司 wretched 讨厌的;悲惨的;破旧的 ...
refer to
... at random任意地; 随便地 refer to提及;涉及,谈到,提到;关系到 whether与if作“是否”讲,在用法上有相同之处,也有不同之处。 ...
at stake
... at liberty 自由,有权(做某事);闲着 at (the) most/least 至多/至少 at stake 关系到...的得失;在危险中 ...