at nine years of age

Now we'll play a passage of Mozart—a symphony by Mozart here that he wrote at the ripe old age of nine years.

现在我们来播放一段莫扎特的作品，莫扎特他在晚年用了九年时间创作了这首交响乐

Now we'll play a passage of Mozart — a symphony by Mozart here that he wrote at the ripe old age of nine years.

现在我们要放的这个片段来自莫扎特-，这首交响曲是莫扎特在九岁那年写的。

After being diagnosed with a brain tumour at the age of nine, Lizzy missed three years of schooling before returning to study part-time.

九岁的时候，Lizzy被查出患有脑癌，三年后，她才得以重返校园，但学习的同时还必须坚持治疗。