The most interesting thing I discovered is that the wings flap so rapidly that they produce, you know, the “buzzing” sound. In fact, the honey bee’s wings flap 11,000 times per minute.
다시 듣기 : In fact, the honey bee’s wings flap 11,000 times per minute.
A. To indicate how a bee produces a familiar noise
B. To explain how fast a bee can fly
C. To introduce the source of a bee’s speed
D. To point out the sturdiness of a bee’s wing