One end of the see - saw goes up while the other end goes down.跷跷板一头起来,另一头就下去.Prices see - saw according to demand.物价随需求变化而反覆涨跌.Changing demand causes a see - saw in prices.需求不断变化造成价格反覆涨跌....
就是这个，伙计们，业内最好的唱片指南。This is it, folks: the best record guide in the business.指南上有对每个饭店的简评。The guide book contains a short write-up of each hotel.安装时最糟糕就是操作指南讲述不够清楚。The worst part of the set-up is the poor instruction manu...
...pests like aphids which infest cereal crops.像蚜虫这样大肆侵害谷物的害虫Bunchy top disease can spread from plant to plant and it is also spread by aphids.束顶病可以通过个体间传播,也可以通过蚜虫传播.Heavy rain or hail may dislodge many aphids from the p...