六级At the time, coca leaf extract mixed with wine was a common tonic (滋补品), and Pemberton's sweet brew was a way to get around local laws prohibiting the sale of alcohol.

当时，古柯叶提取物与葡萄酒混合是一种常见的补品(滋补品), 彭伯顿的甜酒是绕过当地禁止销售酒精的法律的一种方式。

2017年12月六级真题（第一套）阅读 Section C

四级They are deprived of chances to turn over a new leaf.

他们被剥夺了改过自新的机会。

2015年12月阅读原文

六级The "coca" in the name referred to the extracts of coca leaf that the drink's originator, chemist John Pemberton, mixed with his sugary syrup 浆果.

名称中的“古柯”指的是古柯叶提取物，该饮料的创始人、化学家约翰·彭伯顿将其与糖浆混合浆果.

2017年12月六级真题（第一套）阅读 Section C

考研The carbon dioxide (CO2) from the air may enter the leaf as a gas but is dissolved in water in the leaf before it is combined with a part of the water to form simple sugars—the base material from which the plant body is mainly built.

来自空气的二氧化碳（CO2）可能以气体的形式进入叶片，但在与一部分水结合形成单糖之前，它会溶解在叶片中的水中，单糖是植物主体主要构建的基础材料。

1991年全国硕士研究生入学统一考试英语试题

考研The leaf surface is not solid but contains great numbers of minute openings, through which the carbon dioxide enters.

叶片表面不是固体，但含有大量微小的开口，二氧化碳通过这些开口进入。

1991年全国硕士研究生入学统一考试英语试题

考研The same structure that permits the one gas to enter the leaf, however, permits another gas—water vapor—to be lost from it.

然而，允许一种气体进入叶片的相同结构也允许另一种气体——水蒸气——从中流失。

1991年全国硕士研究生入学统一考试英语试题

考研Since carbon dioxide is present in the air only in trace quantities (3 to 4 parts in 10,000 parts of air) and water vapor is near saturation in the air spaces within the leaf (at 80℉, saturated air would contain about 186 parts of water vapor in 10, 000 parts of air), the total amount of water vapor lost is many times the carbon dioxide intake.

由于二氧化碳仅以微量（10000份空气中的3至4份）存在于空气中，并且水蒸气在叶片内的空气空间中接近饱和（80℉, 饱和空气在10000份空气中含有约186份水蒸气），水蒸气损失的总量是二氧化碳摄入量的许多倍。

1991年全国硕士研究生入学统一考试英语试题

考研Also, not all of the carbon dioxide that enters the leaf is synthesized into carbohydrates (碳水化合物) .

此外，并非所有进入叶片的二氧化碳都被合成为碳水化合物(碳水化合物) .

1991年全国硕士研究生入学统一考试英语试题