Word: 底线 (dǐxiàn) Traditional: 底線 底线 dictionary entry dǐxiàn bottom line; baseline; under thread; spy Full dictionary entry for 底线 Example sentences using 底线 2 sentences, showing page 1 of 1. 做实验不能造假，这是底线。 Zuò shíyàn bùnéng zàojiǎ, zhè shì dǐxiàn. You can't fake results in an experiment; that's the bottom line. 这是我的底线，不能再退了。 Zhè shì wǒ de dǐxiàn, bùnéng zài tuìle. This is my bottom line, and I can't give any more ground.