Overcrowding remains a large obstacle to improving conditions.

过度拥挤仍然是改善条件的一大障碍。

《柯林斯英汉双解大词典》

A lack of qualifications can be a major obstacle to finding a job.

学历不足可能成为谋职的主要障碍。

《牛津词典》

The falls have always been an insurmountable obstacle for salmon and sea trout.

这些瀑布始终是鲑鱼和海鳟鱼不可逾越的障碍。

《柯林斯英汉双解大词典》

But Warren says the good news comes at a time when researchers are facing a big obstacle - limited funding.

VOA: standard.2010.07.15

Milton's own faculty of memory - this is the idea that I'm going to be floating here - seems to provide something like, or pose a stumbling block or an obstacle for, his attempt to write an original, divinely inspired poem.

在这里我想说,弥尔顿自己的记忆系统,似乎想提供某种东西，或者想在他写出一部原创的，伟大的诗作的尝试上设置一个障碍。

耶鲁公开课 - 弥尔顿课程节选

Idries says another obstacle to dentente between Iraq's Shi'ites, Sunnis,and Kurds is the existence of four-million Iraqis, living abroad, many of whom are disenfranchised.

VOA: standard.2009.10.26

The vehicle has a built-in safety system that uses lasers and three-dimensional models of its surroundings to navigate obstacle-strewn warehouses.

FORBES

Knievel rose to fame in the late 1960s and 1970s as an obstacle-jumping motorcycle daredevil who ignored odds -- and often paid the price.

CNN: Showbuzz

While approval required a simple majority, the measure faced one obstacle -- if two-thirds of the voters in at least three of Iraq's 18 provinces rejected it, the vote would have failed.

CNN: Iraqi constitution passes, officials say