开足马力

kāi zú mǎ lì

to accelerate at full power (idiom); at full speed

fig. to work as hard as possible

开

kāi

to open (transitive or intransitive)

足

zú

(bound form) foot; leg

马

mǎ

abbr. for Malaysia 馬來西亞|马来西亚[Ma3 lai2 xi1 ya4]

力

lì

power