现在许多人造奶油和黄油都是用多不饱和脂肪酸做的，因此需要冷冻保藏。

Many of today's margarines and butter alternatives are made with poly-unsaturated fats and thus require refrigeration.

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已调制或保藏鲣类，整条或片块（剁碎者除外），冷冻者。

Skipjack and bonito (Sarda spp. ), whole or in pieces, but not minced, prepared or preserved, frozen.

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低温冷冻是保藏食品最简便的办法。

Deep freezing is the simplest way of preserving food.

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