upon

upon的英语例句

1. Many of the British upper classes are no longer very rich.

   英国的上流社会许多人已不再富得流油。

2. A cold is an infection of the upper respiratory tract.

   感冒是上呼吸道的感染。

3. They have purged thousands from the upper levels of the civil service.

   他们从上层文职部门清除了上千名公务员。