“尽管……，还是……” the construction “尽管……，还是……

The first clause uses the conjunction “尽管” to state the condition of concession, while the second clause indicates an abrupt turn in meaning, frequently using “还是”, which means still, to echo with first clause. “可” or “ 却” can also be added before “ 还是” to reinforce the meanng of abrupt turn, for example,
尽管国家经济在不断发展，还是不能很快地提高人民的生活水平。
尽管他已经表示同意，可还是不愿意马上就签合同。
他尽管身体有点儿不舒服，却还是坚持工作。