881、The ratio of width to depth must be 30 or more at each point.

442、If the meaning changes, use a different construction.

441、解释如何检查它们是否正常运行,以及如何识别故障。

440、词典包括一些未经批准的词,如果能把这些词归在适用的技术名称类别中,它们可以是技术名称。

439、Revisions additions and deletions shall be identified by a vertical black line along the outside of the page opposite only that portion of the printed matter that was1changed.

438、You can stow life vests in the space under the seats.

437、我们建议你不要在机库里执行此程序。

436、Use an equivalent material if the specified one is not available.

435、Find new troubleshooting procedures.

434、确保油箱里的燃油不超过 300 千克。

433、If a word that you want to use is not in the dictionary, search for that word in an English dictionary arid find which is the best synonym listed in the STE dictionary.