我们在公园里野餐时，坐在一棵大橡树下。

We sat under a big ___oak tree while having a picnic in the park.

这张实心橡木桌子非常坚固耐用。

This table is made of solid ___oak, making it very sturdy and durable.

他们的婚姻像橡树一样历经风雨却依然坚固。

Their marriage has weathered storms like an ___oak tree, remaining strong.