rapid
例
The rapid river flowed swiftly downstream.
速い川が速く下流に流れた。
02
happening or completed in a short time
Rapid
01
急流
a fast and turbulent part of a river with swift currents and obstacles like rocks
例
They navigated the river 's rapids with skill and caution.
彼らは川の急流を巧みに慎重に進んだ。
