ingredient中等

Certain artifacts are especially vulnerable because some pioneers in plastic art didn’t always know how to mix ingredients properly, says Thea van Oosten, a polymer chemist who, until retiring a few years ago, worked for decades at the Cultural Heritage Agency of the Netherlands.

高分子化学家西娅·范·奥斯滕说，某些手工艺品尤其脆弱，因为一些塑料艺术的先驱者并不总是知道如何恰当地混合原料。她在几年前退休之前，在荷兰文化遗产局工作了几十年。

Impulsive spending isn’t an option, so plan your week’s menu in advance, making shopping lists for your ingredients in their exact quantities.

冲动消费是不可取的，所以要提前规划好一周的菜单，列出购物清单，写明所需食材的确切数量。

have their ingredients analyzed.

对其成分进行分析