broil: American English to cook something under direct heat, or over a flame on a    barbecue []

grill: if you grill something, or if it grills, you cook it by putting it on a flat metal frame with bars across it, above or below strong direct heat:

toast: to make bread or other food brown by placing it close to heat

bake:    to cook something using dry heat, in an    oven

全部炒自LONGMAN DICTIONARY OF CONTEMPORARY ENGLISH,不是plagiarize