There were two very large oak trees in front of our house with wide spreading branches and luxuriant foliage.

那时我们家门口有两棵枝广叶茂的大橡树。

《柯林斯英汉双解大词典》

So they go out where elms and oak trees keep.

于是他们走出家门，来到榆树和栎树跪伏着。

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First of all consider an oak tree in a forest of oak trees.

首先想象一下一片橡树林中的某一棵橡树。

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The island has thick wetlands, tall oak trees and a lot of wildlife.

VOA: special.2009.08.17

Under weeping willows and oak trees, musicians gather to play bluegrass at a picking session in rural Cassia,Florida.

VOA: standard.2010.05.28

The oak wood for the oven comes from an organic farm in Pennsylvania that collects old wood from fallen trees.

VOA: special.2009.04.10

Tregothnan Estate near Truro will be providing 350 oak trees for the hull of the vessel.

BBC: Cornish trees for replica of the Mayflower

The caterpillars strip oak trees of their leaves but are also toxic to people.

BBC: NEWS | UK | Magazine | Itching to get at you

One of the oak trees that had fallen, she got caught up into that.

NPR: Biloxi Police Struggle with Hurricane Aftermath