a scarcely perceptible movement的用法和样例：
- A scarcely perceptible smile passed over Kutuzov's podgy face, disfigured by the scar of a wound.
- In that short look Vronsky had time to notice the subdued animation that enlivened her face and seemed to flutter between her bright eyes and a scarcely perceptible smile which curved her rosy lips.
- Moving air, especially a natural and perceptible movement of air parallel to or along the ground.
- There was a faint, barely perceptible movement of the water in the pool.