翻译
87. Thanks to / Because of a series of new inventions
88. I have been more likely to get tired than before / I get tired more easily than before
89. no matter at what expense (cost) / no matter what I have to sacrifice (pay) / would have to sacrifice (pay)
90. the former / shopping online is more convenient and efficient (time-saving) (can save more time)
91. is measured in terms of how much they can borrow