例えば「煮込む」(simmer)と「煮る」(poach)の違いとか(-。－；)
ネイティブチームの見解は下記の通り
Simmer...
It basically means that you cook something tough, like meat for a stew, slowly, on a stove top, in liquid at boiling point.
Poach...
It means that you cook something soft like a egg or fish, very gently and slowly, on a stove top, in liquid. The water should be just below boiling point at about 98 - 99 degrees.
「simmer」は、シチューのように固い肉を煮込む時などに使う言葉。
「poach」は、煮魚のように柔らかい物に味をしみ込ませる時などに使う言葉。
難しいですね！(´Д｀；)