8 sentences

1. 这一行为逾越了法律的底线。

   zhè yī xíng​wéi yú​yuè le fǎ​lǜ de dǐ​xiàn.

   This behavior has crossed the legal line.

   Source: Dong Chinese Dictionary

2. 法律是维护社会公平正义的底线。

   fǎ lǜ shì wéi​hù shè​huì gōng​píng zhèng​yì de dǐ​xiàn.

   Law is the baseline for maintaining social fairness and justice.

   Source: Dong Chinese Dictionary

3. 他的行为已经触及了我的道德底线。

   tā de xíng​wéi yǐ​jīng chù​jí le wǒ de dào​dé dǐ​xiàn.

   His behavior has already crossed my moral bottom line.

   Source: Dong Chinese Dictionary

4. 身为财务人员，严守职业底线，绝不能触碰红线。

   shēn​wéi cái​wù rén​yuán, yán​shǒu zhí​yè dǐ​xiàn, jué bù​néng chù​pèng hóng​xiàn.

   As a financial professional, one must strictly uphold professional standards and never cross the red line.

   Source: Dong Chinese Dictionary

5. 在谈判中，我们已经退到了底线，再没有退步的余地了。

   zài tán​pàn zhōng, wǒ​men yǐ​jīng tuì​dào le dǐ​xiàn, zài méi​yǒu tuì​bù de yú​dì le.

   In the negotiations, we have already reached our bottom line and have no further room for compromise.

   Source: Dong Chinese Dictionary

6. 网球落在了底线附近。

   wǎng​qiú luò zài le dǐ​xiàn fù​jìn.

   The tennis ball landed near the baseline.

   Source: Dong Chinese Dictionary

7. 缝纫机的底线断了，需要重新安装。

   féng​rèn​jī de dǐ​xiàn duàn le, xū​yào chóng​xīn ān​zhuāng.

   The bobbin thread of the sewing machine broke and needs to be reinstalled.

   Source: Dong Chinese Dictionary

8. 诚信经营是一个商人必须守住的底线。

   chéng​xìn jīng​yíng shì yī gè shāng​rén bì​xū shǒu​zhu de dǐ​xiàn.

   Operating with integrity is a bottom line that every merchant must uphold.

   Source: Dong Chinese Dictionary