- 重点词汇
- problemn.问题;习题;
- extractingn.萃取，提取，提炼;
- majoradj. 主要的;重要的;大调的;主修的（课程）;
- inprep. 在里面;在(某范围或空间内的)某一点;在(某物的形体或范围)中;在…内;在…中;进入
- ofprep. 关于;属于…的;由…制成;
- were be的过去时复数和第二人称单数形式;有时代替 was,用于条件从句、动词 wish 之后等;
- discolorationn.变色，褪色，污染;
- raten.速度，进度;比率;价格，费用;房产税;
- juicen.果汁;肉汁;胃液;能源（如汽油或电力）;
- theart.这个;指已提到或易领会到的人或事物;指独一无二的、正常的或不言而喻的人或事物;用以泛指;与形容词连用，指事物或统称的人;用于姓氏的复数形式前，指家庭或夫妇;（指特定用途的事物）足够，恰好;每，一;当前的，本，此;（重读，表示所指的为知名或重要的人或事物）
- 相关例句
用化学防腐剂冲洗或覆以一层防腐物以防 ( 照片 ) 褪色.
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云南铁杉在干燥过程中的变色问题是困扰许多木业企业的一个技术难题.
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结果合适的稳定剂大幅度延缓了复方水杨酸洗剂的氧化变色速度.
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Frequently, early in the disease, the skin is discolored by a marked erythema.
常在疾病早期, 皮肤因有明显的红疹而变色.
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The goods have been discolored and heavily saturated by rain that they are unsaleable.
货物被雨水严重浸湿和污染,无法销售.
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We saw his lips were puffed both eyes were discolored. His face discolored and swollen.
我们看见他嘴唇肿起,两眼充血,脸庞青肿.
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Notice the canals in your community : do they appear healthy or are they smelly and discolored?
请关注你周围的河沟: 河水是正常的还是有臭味并且变了颜色?
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Charles looked round him at the dingy smoke-discolored walls, the worm-eaten staircase.
查尔斯环视被烟熏黑的墙壁和虫蛀的楼梯.
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The mechanism of the improvement and discoloring the adsorbents andthe additive was elucidate.
从理论上阐述了提高粉煤灰基质多孔吸附材料吸附、脱色性能的机理.
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