31.   This model of typewriter is efficient and durable， economical and practical for middle school students.

    這個(gè)型號(hào)的打字機(jī)對(duì)中學(xué)生來說，高效、耐用、經(jīng)濟(jì)、實(shí)惠。

    32.   The computer we produced is characterized by its high quality， compact size， energy saving and is also easy to learn and easy to operate.

    我們生產(chǎn)的計(jì)算機(jī)其特點(diǎn)是質(zhì)量好，體積小，節(jié)能，而且易學(xué)好用。

    33.   They are not only as low-priced as the goods of other markers， but they are distinctly superior in the following respects.

    它們不但和其它廠家的產(chǎn)品一樣低廉，而且在以下幾個(gè)方面有其獨(dú)特的優(yōu)越性。

    34.   You will get a 30% increase in production upon using this machine and also it allows one person to perform the tasks of three people.

    一旦使用該機(jī)器，你們將會(huì)增產(chǎn)30%，而且一個(gè)人可以頂3個(gè)人使用。

    35.   This product will pay its own way in a year.

    該產(chǎn)品一年就可收回成本。