1231、操作调光器电门,确保光强发生变化。

257、喷油嘴堵塞可能导致操作错误。

256、Get the correct tools to open the containers for these materials. 用正确的工具打开这些材料的容器。

255、Mix the material with a spatula.

254 、 The assembly extends through the casing assemblies and is connected to the telescopic controlassembly

253、Adjust the door operating rod until it aligns with the attachment point. 调整门操作杆，直到与连接点对齐

252、When you replace a word, always make sure that the alternative you select does not change themeaning of the sentence. 当你替换一个单词时，一定要确保你选择的替代选项不会改变句子的意思。

251、The selection of data by the handbook producer, to be included in this Section shall be governed by theconcepts contained in the preface of this Specification. 手册生产者对本节所包含的数据的选择应受本规范序言中所包含的概念的约束。

250、lt is the responsibility of the airplane owner and the pilot to insure that the airplane is loaded properly

249、Lower the antenna to get access to the cable connector.

248、在使用危险品之前，请遵守以下注意事项：