Scientists talk about many kinds of subjects -- from black holes to biological clocks to botany.

VOA: special.2010.05.14

some kind of old clocks, a lot of time management, measurement devices,

一些旧钟，很多用于时间管理的测量仪器，

时间开始的地方 - SpeakingMax英语口语达人

John Harrison's clocks can be seen today at the Old Royal Observatory in Greenwich,England.

VOA: special.2010.07.14

The painting shows melting clocks,insects, and a dead tree in an empty landscape.

VOA: special.2010.03.24

The clocks became known as chronometers.

VOA: special.2010.07.14

The topics discussed at these science cafs are as varied as scientific research itself: from black holes to biological clocks to botany.

VOA: standard.2010.05.04