Tetraglycol
四甘醇, 三水縮四乙二醇
??? 情景例句
Are all these goods made in your factory?
所有這些貨物都是貴廠生產的嗎？
All our work was in vain.
我們白干了一場。
This shows how long it was before we deemed it necessary to make sure that all our children could share in the knowledge accumulated by the'happy few' during the past centuries.
這說明，經過了多么漫長的時間之后，我們才認識到，有必要確保我們的孩子享有多少個世紀以來由‘少數幸運者’所積累起來的知識。