We were given a brief demonstration of the computer's functions.
有人向我們簡短演示了這種計算機的各種功能。
The police were much in evidence at today's demonstration.
在今天的示威集會上警察隨處可見。
She walked me through a demonstration of the software.
她一步步地給我演示軟件。
There was a strong police presence at the demonstration.
示威現場有了大批警察。
The police are preparing themselves for trouble at the demonstration.
警察正在準備防范示威時可能出現的騷亂。