He adds that Russia in this field is far behind what he calls the modern civilized world.

VOA: standard.2009.03.20

and so there are some products where... at least, as far as, I don't know this field very well,

所以有的产品……至少，我对这个领域不是很了解，

广告和价格的关系 - SpeakingMax英语口语达人