10 以至于 [--於] yǐ zhì yú (so-as to) to such an extent as to. . ., so . . . that. . . : 我工作太忙了, ~好几个月没看过电影了. I was so busy working that I hadn’t seen the film for months. || 前任总统的支持率太低, ~没有参 加下届竞选 (jìngxuǎn). The former president’s approval ratings were so low that he did not run for the next election. '