1 however,… , just like anything else, has its negative side as well.
但是， 和其他事物一样，… 也有其不好的一面.
2 of course , the disadvantages can not be ignored.
当然, 缺点也是不能忽视的。
3 however, … may also cause/bring about/lead to/result in/contribute to some problems.
但是，…… 也可能诱发一些问题。
4 however, it’s often blamed for its obvious defects.
但是，它经常因一些明显的缺陷而受到指责。
5 everything has two sides, … is no exception.
每个事物都有两面性， …… 也不例外。
