Apple seeds for instance contain a chemical that releases cyanide when it comes into contact with digestive enzymes.

例如苹果籽含有苦杏仁（amygdalin，或扁桃），遇到动物的消化酵素就会释出氰化物。

The explanation is that occasional individual almond trees have a mutation in a single gene that prevents them from synthesizing the bitter-tasting amygdalin.

解释是，偶尔个别杏仁树的单个基因发生突，它们无法合成苦味的苦杏仁。

Most wild almond seeds contain an intensely bitter chemical called amygdalin, which (as was already mentioned) breaks down to yield the poison cyanide.

大多数野生杏仁种子含有种叫做苦杏仁的强烈苦味化学物质，它（如前所述）会分解产生有毒的氰化物。