chalk是什么意思

网络释义

用法例句

A study on time－dependent behavior of the North Sea unsaturated chalk;

非饱和白垩压缩变形依时特性的研究

Both the engineering practice and laboratory tests show that structural collapse in petroleum chalk tends to occur during water injection.

工程实践和室内试验都表明 ,油田白垩遇水后极易发生颗粒结构崩溃现象。

The characteristics between calcareous clay and chalk and marlite have been compared in mineral composition and structure etc.

对一种新的非金属矿产———钙土矿的地质特征、矿石特征、物化性能及其在工业领域的应用前景作了介绍，并从矿物组成、结构等方面与白垩、泥灰岩作了对比。

Regularity of Rice Chalkiness Occurrence and its Modified Ways;

稻米垩白的发生规律及改良的可能途径

The influential factors and hereditary improvements on the chalkiness of rice grains;

稻米垩白的影响因素及遗传改良

Genetic Variance of Chalkiness of Different Grain Positions in a Panicle;

稻穗不同部位籽粒垩白程度变异分析

Of, containing, or resembling chalk.

白垩的白垩的、含白垩的或似白垩的

cretaceous period [ system ]

【地质】白垩纪[系]

armored herbivorous dinosaurs of the Cretaceous.

白垩纪的有甲食草恐龙。

To treat(soil, for example)with chalk.

用白垩处理（如土壤）

acid degradable chalk mud

可用酸降解的白垩泥浆

Sedimentary Geology of Cretaceous in Southern Tibet, and the Upper Cretaceous Oceanic Redbeds;

藏南白垩系沉积地质与上白垩统海相红层

A pure white grade of chalk that has been ground and washed for use in paints, ink, and putty.

白垩粉，白粉一种碾碎的并洗过的纯净白垩，用于油漆、墨水和油灰

The results show that the Cretaceous strata located in Sancha-Sidianwas deposited in late Cretaceous. At least, it contains late Cretaceous strata.

结果表明这一带的白垩系地层沉积于晚白垩纪 ,或至少含有晚白垩纪的沉积。

The Cretaceous is named after the large amounts of chalk (fossilized plankton) found in rocks of the period.

白垩纪以这个时代的地层主要为白垩沉积而得名。

of or relating to the Cretaceous geologic era.

属于或关于地质上白垩纪的。

From the view of stratigraphy, they all belong to the Cretaceous period.

从地层学上看，它们都属于白垩纪。

a salt found in nature as chalk or calcite or limestone.

白垩、方解石或石灰石等天然的盐。

To rub or cover with chalk, as the tip of a billiard cue.

擦抹粉块以白垩擦或覆盖，如弹子棒梢

alkaline soils derived from chalk or limestone.

从白垩或者石灰石中得到的碱土。

At this point, the chald cliffs shelve down to the beach.

在这里，白垩质的峭壁渐渐向海滩倾斜。

chalk beer-wort yeast litmus milk

白垩、麦芽汁、酵母浸膏石蕊牛乳(培养基)

residual chalk deposits,ie left after rocks have been eroded

残余白垩沉积（岩石经侵蚀后的）

chalk laden HEC

加入白垩的羟乙基纤维素