Jig plates can be divided into fixed , hinged demountable and swing types.常见的钻模板有固定式、铰链式、可卸式 、 悬挂式等四种结构形式.Oil prices continued an upward swing in New York this morning.今天上午纽约油价继续上扬。His moods swing alarmingly.他的心情时好时坏,令人担...
The forecast is for changeable weather.预报针对的是变化无常的天气。The weather is very changeable at this time of year.年年在这个时候天气都变化无常。The heavy rain might settle the changeable weather.这场大雨也许能使变幻不定的天气稳定下来....