To open the amber, place the sample in liquid nitrogen, where it will freeze and become brittle.
打开琥珀，将标本放入液氮之中，此时它会被冷冻，并变得易碎。
To open the amber , place the sample in liquid nitrogen , where it will freeze and become brittle .
打开琥珀，将标本放入液氮之中，此时它会被冷冻，并变得易碎。
To open the amber , place the sample in liquid nitrogen , where it will freeze and become brittle .
打开琥珀，将标本放入液氮之中，此时它会被冷冻，并变得易碎。
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