under pressure 托福

Oil is cracked by heating under pressure.

石油在一定力下加热分解。

Wood blocks may compress a great deal under pressure.

木块可缩小很多。

Propylene,the common petroleum gas,is subject to gasification under heating and liquification under pressure.

丙烯是一种热易气化、易液化的常石油气。

He’s only seventeen, but he has an old head on young shoulders and remains calm under pressure.

他只有十七岁，不过却少年老成，面对力沉着。