1. This piece of jewelry is an heirloom that has been passed down all the way from my great grandparents.2. This gold hairbrush is our family heirloom, and I will give it to you when you get married.
 (family) heirloom a family possession handed down from generation to generationheirloom = 不一定是值錢的東西, 卻是家家代代傳下來的東西 = 一代傳一代的東西，可說是傳家之寶，但不一定很珍貴a family possession handed down from generation to generation 是白話的說法。
這是一個連環問題: 燃燒石油導致二氧化碳增加，二氧化碳增加導致溫室效應，溫室效應導致冰層融化、海平面上升。 (請填空)
This is a chain of problems. Burning oil leads to increase in carbon dioxide, which leads to the greenhouse effect, which leads to melting of glaciers, which leads to risin sea levels.