The police were much in evidence at today's demonstration.

　　在今天的示威集會(huì)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(xiàn)場(chǎng)有了大批警察。

　　The police are preparing themselves for trouble at the demonstration.

　　警察正在準(zhǔn)備防范示威時(shí)可能出現(xiàn)的騷亂。

　　Lectures will be interspersed with practical demonstrations.

　　講課中將不時(shí)插入實(shí)際示范。