Brussels sprouts get a bad rap because they are often overcooked , which makes them sulfurous and hard to stomach .
球芽甘蓝之所以口碑很差是因为它们经常被煮老了，致使他们含有硫磺对胃部不好。
The oil extracted from the sands in the northeast corner of alberta begins as bitumen , a thick and sulfurous heavy-oil precursor , and the costs of mining and processing it are immense .
