不定: indefinite, indeterminate, (botany) adventitious...
危及: to endanger, to jeopardize, a danger (to life, national security etc)...
撇: to throw, to cast, left-slanting downward brush stroke (calligraphy)...
登机: to board a plane...
运行: to move along one's course (of celestial bodies etc), to function, to be in operation, (of a train service etc) to operate, to run, (of a computer) to run...
用于: use in, use on, use for...
占领: to occupy (a territory), to hold...
相关: related, relevant, pertinent, to be interrelated, (statistics) correlation...
爽快: refreshed, rejuvenated, frank and straightforward...
从容不迫: calm, unruffled...
