Objective: To seek the basis for the chemical differentiation between A.

The secretory cells can secrete digestive enzymes and mucus mixtures that the former can participate in extracellular digestion of intestinal lumen and the later play an important role in lubricating lumen, cohering food particles and protecting mucosa.

分泌细胞以顶浆分泌方式分泌酶原和粘液，其分泌的酸性和中性混合粘液物质可起到润滑肠道、保护粘膜的作用，分泌的消化酶参与肠腔中进行的细胞外消化。

The ciliated columnar cells, teeming with cilia and mitochondria, play the part of food transportation, intracellular and extracellular digestion.

纤毛柱状细胞有密集的纤毛和丰富的线粒体，具有运输食物、细胞内消化和细胞外消化的功能；

The ciliated columnar cells have the function of food transportation, as well as intracellular and extracellular digestion and energy storage in lipid drops and glycogen particles.

纤毛柱状细胞除了能运输食物外，还具有细胞内消化、贮存能量及细胞外消化的功能；

Study on Internal Quality Samples by Urinary Iodine Chloric Acid Digestion

尿碘酸消化法测定中室内质控样的研制

Microwave acid digestion technique and analysis conditions are studied.

研究了样品的消解条件、分析的最佳条件。

Determination of Low Unsaturated Rubber in Its Blend with High Unsaturated Rubber by Acid Digestion

酸消化法测定与高不饱和橡胶并用的低不饱和橡胶

Determination of Urinary Iodine in 211 School Children by Acid Digestion

酸消化法测定学龄儿童尿碘

This puts him in a difficult position.

这回把他难住了.

Together, these factors have put Hong Kong in the difficult position which we face today.

种种因素,使香港整个经济陷入困境.

They're all in a difficult position.

他们都处在很艰难的位置.

It put me in a rather difficult position.

那让我处于相当艰难的位置.

You place me in very difficult position.

你使我处境很困难.

You place me in a very difficult position.

你使我的处境很困难.

Moreover, advertisement management falls into difficult position as competition and more fierce.

另一方面市场竞争越演越烈, 广告经营陷入困境.

They knew themselves to be in a difficult position.

他们知道他们的处境很困难.

Group B regions are in the most difficult position.

B这种地区处境最为困难.

This is present estate market goes out the difficult position the key.

这是目前房地产市场走出困境的关键.

Their refusal puts us in a difficult position.

他们拒绝后,我们便陷入了困境.

You place me in a difficult position.

你置我于困难境地.

You don't understand what a difficult position I'm in.

你不会明白我的处境多么困难.