These, then, are the main areas of concern.

　　總之，這些是人們主要關(guān)注的方面。

　　Everyone experiences these problems at some time in their lives.

　　每個(gè)人在人生的某個(gè)階段都會(huì)經(jīng)歷這些問題。

　　All these jobs can now be done by one single machine.

　　所有這些工作現(xiàn)在只用一臺(tái)機(jī)器就可以完成。

　　Use of these chemicals may present a fire risk.

　　使用這些化學(xué)品可能有失火的危險(xiǎn)。