预热

The method adopts powders (10.0 parts of mass) of crop straws and phenols or polyalcohol compound (10 to 100 parts of mass) which is firstly pre-heated by 10 to 30 minutes under a temperature of 30 to 200 DEG C with the effect of acid catalyst (0.5 to 10 parts of mass) for a reaction of 30 to 240 minutes; after the reaction, the compound is washed, neutralized, filtered and dried to obtain a solid appearing as a color from citron yellow, yellow, bight brown to seal brown; wherein, the solid includes 64.0 to 70,0 percent of fibrin and 4.1 to 7.6 percent of lignin.

秸秆"液化"预处理制备生产燃料乙醇原料的方法，是用农作物秸秆的粉末(10.0质量份)和酚类或多元醇类化合物(10～100质量份)，在酸性催化剂(0.5～10质量份)存在下，在30～200℃温度下预热10～30min后，反应30～240min，反应完毕进行洗涤、中和、过滤和干燥而得呈淡黄色-黄色-浅褐色至深褐色固体，其中，纤维素含量64.0～70.0％，木质素含量4.1～7.6％。

It may be helpful in cold ambient conditions to avoid the risk of condensation and possible resultant porosity.

在寒冷的环境下为了预防冷凝和产生多孔的焊缝，使用预热可能会有一定帮助。

It is not allowed for you to preheat with the torch holding in hand.

用手握火炬进行预热是不允许的。

Preheat oven to 350 degrees f (175 degrees c).

把微波炉预热到350华氏度（175摄氏度）。

It is not allowed to hold a torch to preheat.

用手握火炬进行预热是不允许的。

Preheat oven to 200'C (400'F).

先将烤箱预热到200度C (400度F)。

Preheat over to 350°F (175°C).

烤箱预热到175°C

Preheat oven to(180℃～350°F ).

预热焗炉至180℃～350°F。

Preheat oven to 350°F (175°C).

把烤箱预热到175°C

Simply preheat your electric oven to 150 F, and heat your plates for about five minutes.

简单地将你的电炉预热到150华氏度，将你的盘子加热五分钟左右。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。