1·The official salaries of most Russian workers hover around a hundred dollars a month, although many earn some undeclared income on the side.
尽管许多人挣得了一些未申报的收入，但官方出具的俄罗斯工人的薪水却徘徊在每个月一百美元左右。
2·Examples include: food found to contain botulinum toxin, food with undeclared allergens, a label mix-up on a lifesaving drug, or a defective artificial heart valve.
例如：含有肉毒杆菌毒素的食品，含有未申报的过敏原的食物，抢救用药标签混乱，或有缺陷的人工心脏瓣膜。
3·Undeclared income is the biggest category, but not the only one.
未申报的收入是最大的类别，但不是唯一的。
4·This code shows error "stu undeclared"? What should I do.
这个代码显示了错误“斯图未申报”？ ？我应该做些什么。