Use a sharp knife that slices cleanly through the fish in one action.

应当用一把锋利的刀将其一次性一刀就切下来。

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You can also use a sharp knife, hold the cob vertically and cut downward.

你也可以用一把锋利的刀，竖直地握住玉米棒子然后从下面切起。

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Use a sharp knife or some scissors to cut a hole in one side of the cup, near the base.

用一把锋利的刀或剪刀在杯子的一端剪开一个洞。

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Once cooked all the way around (after about five minutes), use a sharp or serrated knife to saw the kernels off the cob.

WSJ: Josh Habiger and Erik Anderson's Elote Corn Salad With Piment��n-Mayo | Slow Food Fast