Another source of concern: the discovery of 20 tar balls off Key West,Florida on Monday.

VOA: standard.2010.05.18

So we needed to come up with another source, a renewable source, so we turned our attention to embryonic stem cells.

因此，我们需要一种替代材料，一种可以再生的材料，我们注意到了胚胎干细胞胚胎干细胞。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Here's another example where you have high fructose corn syrup is the source of sugar is in ketchup.

这还有一个例子,番茄酱中糖的来源是高果糖玉米糖浆

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Another major source of blood comes from the relatives of those who need the blood.

VOA: standard.2010.06.04

Milton uses for his source for the character Sabrina another character named Sabrina from Spenser's The Faerie Queene.

弥尔顿将Sabrina这一角色用作他的资源,另一个Sabrina是斯宾塞《仙后》中的。

耶鲁公开课 - 弥尔顿课程节选