Biscuits will stay crisp if you keep them in an airtight tin.如果你把饼干放到一个密闭的铁罐里, 它就会保持松脆。Ampoules are airtight glass containers that are filled with a concentration of highly active ingredients.安瓶是充满高度有效成分的集中的不漏气的玻璃容器.Stor...
我部门对维持低水平开支有浓厚兴趣。My department had a healthy interest in keeping expenses down.能源价格一直维持低水平，所以能源利用效率很低。Energy prices have been kept low, so energy is used inefficiently.近来这个班的成绩一直处于较低水平.The work of this class has been fal...
这种甲虫主要吃谷物的胚芽.This beetle eats mainly the germ of the grain.我们用气相层析法来测定各种谷物的水分.We use gas chromatography for moisture determination in a number of grains.全国各地牧场对套种谷物的选择都不相同.Farmers'preferences for a companion cereal ...
At Gibraltar we were greeted by the governor, Lieutenant General Sir F . N . Mason MacFarlane.我们在直布罗陀受到总督梅森·麦克法兰中将的欢迎.Gibraltar is the key to the Mediterranean.直布罗陀是地中海的要冲....the Straits of Gibraltar.直布罗陀海峡The Rock of Gi...