Bahasa Jepangnya “maju perlahan”

berdebam pelan; maju perlahan; cukup untuk menutupi; dengan cepat

lapping (e.g. of waves against the shore); steadily (advancing); sufficient (of the amount of liquid needed to cover a submerged object); speedily

kemajuan bertahap; pergerakan maju perlahan

gradual progress; steady advance