Cocaine:A substance derived from the leaves of thecocaplant that is a bitter, addictive substance formerly used as an麻醉. Safer anesthetics thancocaine是在20世纪,alt吗hough it is still used as an injectable anesthetic by some dentists. Synthetic alternatives, such asprocaine, are used far more widely. Tragically, cocaine is a highly addictive and destructive street drug.
