Meaning of dào dǐ:
到底
finally; in the end; when all is said and done; after all; to the end; to the last
Tā dàodǐ zhǎodào le tā de yàoshi.
他到底找到了他的钥匙。
He finally found his keys.
Wǒmen dàodǐ qùle gōngyuán.
我们到底去了公园。
In the end, we went to the park.
Wǒmen jīntiān wǎnshàng dàodǐ qù nǎlǐ chīfàn?
我们今天晚上到底去哪里吃饭?
Where are we going to eat dinner tonight, when all is said and done?
Zhè jiàn shìqing dàodǐ rúhé jiějué?
这件事情到底如何解决?
How will this matter be resolved after all?
Wǒmen bìxū jiānchí dào dǐ.
我们必须坚持到底。
We must persevere to the end.
Wǒmen xiànzài yào dàodǐ kàn shéi néng jiānchí dào zuìhòu.
我们现在要到底看谁能坚持到最后。
Now we have to see who can hold on to the last.