该目昆虫的前翅发展成坚硬的鞘翅或壳.In this order the the forewings are modified to form hard elytra or cases.鸟儿的翅膀肿了,前翅不见了.The birds'wing was swollen and the primaries missing.雄蟋蟀凭借前翅的磨擦发出唧唧声.TYPICAL USE : Male crickets chirping noi...
A curved-inwards wall has a convergent effect on wall spray.凹型壁面对碰壁喷雾有聚集作用。We shall study a very particular kind of sequences, called convergent sequences.我们将研究称为收敛数列的很特别的一类数列.The finite - difference computation must be ...
Our tour prices bore little resemblance to those in the holiday brochures.我们的旅游报价和那些度假手册里的价格相去甚远。New Year's Day is a public holiday throughout Britain.元旦是全英国的公众假日。Every worker will be entitled to four weeks' pa...