both Boeing and Airbus have quietly begun double-booking some of their delivery slots, in case a customer collapses. double-book : ~을 중복으로 예약하다. some of ~ : ~ 의 일부 double-book some of their delivery slots : 그들의 delivery slot의 일부를 중복으로 예약 하다.

The acid reacts with the aluminum which can impart an off-flavor and a grayish color. impart A to B : A 에게 B 를 전하다(부여하다). -> A라는 특성을 B에게 주다. Preservatives can impart colour and flavour to a product. The chemicals imparted a bluish color to the paper. from http://www.merriam-webster.com/dictionary/impart http://dictionary.cambridge.org/dictionary/learner-english/impart?q=impart

http://blog.chojus.com/3006

해리포터를 99초로 줄인다면 한글 자막 : http://tvpot.daum.net/clip/ClipView.do?clipid=37251908