可以接受嘅極限(量詞:條) (the minimum acceptable limit)
名詞用例
我已經忍受咗好耐,但係而家已經到咗我嘅底線喇。
ngo5 ji5 ging1 jan2 sau6 zo2 hou2 noi6, daan6 hai6 ji4 gaa1 ji5 ging1 dou3 zo2 ngo5 ge3 dai2 sin3 laa3.
I've struggled on for as long as I can, but now I'm at the end of the line.
球類活動入面,場地上面最前同最後嘅兩條出界線(量詞:條) ((of sports courts) out-of-bounds line; baseline or sideline)
用例
呢一球打出咗底線。
ni1 jat1 kau4 daa2 ceot1 zo2 dai2 sin3.
The ball fell beyond the out-of-bounds line.