Travel in the developing world often involves appallingly long, uncomfortable bus journeys with speed-freak drivers, doubtful safety standards and aircon that is permanently set to 'Max'.

旅行在第三世界国家经常需要乘坐不舒服的、不安全的长途公车。公车的安全标准令人怀疑，空调被长期设定成最大。

youdao

Still, when it comes down to it, it's doubtful that any business would pay for two web office suites at the same time just to get a complete set of features.

一言蔽之，很难想象有企业会为了获得完整的功能同时花钱买两套在线办公产品。

youdao

More relevantly, it is doubtful that fulfilling any set of functions is conceptually sufficient for life.

更贴切地说，这是可疑的：完成任何功能的集合，就概念上充分于生命。

youdao

And with England regular Barry doubtful for the start of the tournament due to an ankle injury that is set to take at least four weeks to heal, Capello may look to add extra midfield cover to his squad.

BBC: Scott Parker worth a World Cup spot - Gianfranco Zola

But whether the idea of Italy's debt being "mutualised" (or shared with German taxpayers) via some kind of shield provided by the IMF will appeal to the German parliament and German central bank - which are set against any such central-bank lending to any eurozone member state - seems highly doubtful.

BBC: Cheer up: It could be much worse

Doubtful about the accuracy of Mr. Hornsby's data, Mr. Berger checked it against the NFL data set and found Pro Football Focus was nearly perfect.

WSJ: In Super Bowl, Giants Go Long for a Number Cruncher