This paper discusses the effect of nonnatural factors such as agricultural production system and farming practices on soil fertility. Special attention was paid to the effect of soil fertility degradation on sustainable agricultural development.

Nonnatural D-amino Acid Bioconversion by Engineered Strains

工程菌生物转化D-型氨基酸的研究

In the 16th century, they had become so covered with ornamentation that a law eventually banned such ostentatiousness.

到了16世纪，贡多拉被装饰得很花哨，但最后法律禁止这样招摇的装饰。

Preparation of ketoprofen gel and experiment on percutaneous absorption in vitro

酮洛芬凝胶的制备及体外透皮试验

Influence of different coating materials on drug released rate of ketoprofen pellets

不同包衣材料对酮洛芬缓释微丸释药速度的影响

Studies on the ketoprofen film A catheter with silicone rubber coating Sculpture on Skin

酮基布洛芬经皮吸收涂膜剂的研究

Quantitative determination of ketoprofen suppository by second derivative spectrum

二阶导数光谱法测定酮基布洛芬栓的含量

The server official moves close to president's ear and says: The soup of the ginseng and sea-ear are ready!

侍从官立刻上前附耳对总统说：「人参鲍鱼汤已经煮好了！」

This evening Jack orders lobster and sea-ear for her specially, which makes her happy.

晚餐时，杰克专门为她点了龙虾和鲍鱼，让她感到很惬意。

In this thesis, grid partitioning is converted to an unoriented and weighted graph, on which partitioning algorithm is studied.

本文将网格分区问题转化为无向赋权图的分区，在图上研究分区算法。

Engaged in unoriented study; unoriented until she looked at the map.

忙于无目标的学习；在看地图以前她无方向感。

The present unoriented genome reversal sorting algorithms are often too complex and unimplemented.

已有的无向基因组翻转排序算法过程复杂，实现困难。

Surveying adjustment using the circular arc method of three known points unoriented traverse line

圆弧法三已知点无定向导线测量平差

If you swallow too much food , you must choke your throat.

如果你吞食太多, 你的喉咙一定会噎住.

It looked for a moment as though Kreacher was going to choke.

顿时,克利切看起来是被噎住了.

I hit my breaks and mumbled under my breath.

我赶紧刹车吓的我差点噎住.

Now he was choking on a piece of meat.

此时他被一块肉噎住了.

A mouthful went down the wrong way and made him choke.

他一口没吃好使他噎住了.

Ron choked on his bit of toast, and Hermione gasped.

罗恩被嘴里的面包噎住了, 赫敏吃惊地倒抽了一口气.

He choked over his food.

他吃东西噎住了.

He choked while he was eating.

他吃东西时噎住了.