Rising in the Peruvian Andes, its main trunk flows eastwards across Brazil.

它发源于秘鲁安第斯山区，其干流穿越整个巴西。

The main trunk of the nerve, now termed the motor root of the facial nerve, continues anteriorly and inferiorly into the parotid gland.

神经的主干，现在被称为面神经的运动根，向前和向下延伸到腮腺。

There are but two other lake-bearing affluents of the Merced, viz., the South Fork with fifteen, and Cascade Creek with five, both of which unite with the main trunk below Yosemite.

默塞德河只有另外两个含湖支流，即南福克有 15 个， 喀斯喀特溪有 5 个， 它们都与优胜美地下方的主干汇合。

Under this shadow, during the cool centuries immediately following the breaking-up of the Glacial Period, dwelt a small residual glacier, one of the few that lingered on this sun-beaten side of the Valley after the main trunk glacier had vanished.

在这种阴影下，在冰川期破裂后的凉爽世纪里，存在着一个小的残余冰川，这是主干冰川消失后留在山谷这片阳光普照的一侧的为数不多的冰川之一。