When the Berlin Wall came down it wasn't just the roads that opened up but the waterways too.柏林墙一倒，不仅是陆路，连水路也开通了。The city is intersected by three main waterways.该城市由3条主要水路贯穿。On the other hand, federal regulation has...
Infrared detectors have many uses.红外探测器有多种用途。The report advocated that all buildings be fitted with smoke detectors.报告主张所有的建筑物都应安装烟火探测器.This is heady wine for experimenters using these neutrino detectors.对于使用中微子探测器的实验工作者...