問答題

【簡答題】翻譯：Proper control is vital and must be established.

答案：

適當(dāng)?shù)目刂剖潜匾暮捅仨毚_定的。

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【簡答題】翻譯：The most widely used indicator of a crude oil's worth to the producer is its API (American Petroleum Institute) gravity.

答案：

對于工業(yè)生產(chǎn)者來說，衡量一種原油價(jià)值指數(shù)廣泛采用API比重。

【簡答題】翻譯：The operation of a gas transmission system that moves gas over a large geographic area and contains several compressor stations and other facilities is a complex control challenge.

答案：

天然氣集輸系統(tǒng)要把天然氣進(jìn)行跨區(qū)域的輸送，且中間包含若干個加壓站和其他設(shè)施。管理這個組成復(fù)雜的系統(tǒng)是一項(xiàng)挑戰(zhàn)性的工作。