a drop in the ocean (bucket)
drop in the bucket; drop in the ocean; (lit.) one grain of millet in a vast ocean
the world is a scene of constant changes; (lit.) a mulberry field changes into a blue sea
the world is a scene of constant changes; (lit.) a mulberry field changes into a blue sea
the world is a scene of constant changes; (lit.) the blue sea turns into a mulberry field
the world is a scene of constant changes (as a mulberry field changing into a blue sea)