无关紧要 be of no great importance; be nothing serious; be of no significance; count for little; inconsequential; insignificant; make no difference; nothing serious; not to matter a farthing [a hoot; a rap; a sixpence; two hoots; a straw]
If there is an extraordinary reason why you must keep your phone on ( e . g . , you are awaiting critical medical news ) please silence your phone and let your professor know in advance that you may receive a call 如果事关紧要(比如等医院的诊断结果)不得不开机,请置静音,而且事先应告知你的教授你可能要接听一个电话。
After wandering along the lane for two hours , giving way to every variety of thought ; re - considering events , determining probabilities , and reconciling herself , as well as she could , to a change so sudden and so important , fatigue , and a recollection of her long absence made her at length return home ; and she entered the house with the wish of appearing cheerful as usual , and the resolution of repressing such reflections as must make her unfit for conversation 她沿着小路走了两个钟头,前前后后地左思右想,又把好多事情重新考虑了一番,判断一下是否确有其事。这一次突然的变更,实在事关紧要,她得尽量面对事实。她现在觉得疲倦了,又想到出来已久,应该回去了她希望走进屋子的时候脸色能象平常一样愉快,又决计把那些心思抑制一下,免得跟人家谈起话来态度不自然。