Meaning of dǎ dǎo:
dǎ dǎo
打倒
Verb
to overthrow; to knock down; Down with ... !
Tāmen jìhuà rúhé jiāng zhège fǔbài de zhèngquán dǎdǎo.
他们计划如何将这个腐败的政权打倒。
They are planning how to overthrow this corrupt regime.
Tā xiǎng yào dǎ dǎo duìshǒu.
他想要打倒对手。
He wants to knock down his opponent.
Tāmen gāo hǎnzhe “dǎdǎo yāpòzhě!”
他们高喊着“打倒压迫者!”
They were shouting, "Down with the oppressors!"