偶而

Beef is widely distributed and extremely wide variety of cloven-hoofed ruminant animals.

牛类是目前广泛分布而种类极多的反刍偶蹄动物。

SiO〓 crystal transformation was improved by adding Na〓SO〓, alpha cristobalite but not tridymite was catalytic active support. C〓 selectivity was improved by adding W and P, and suppressed deep oxidation property of SiO〓. W-O in catalyst surface was not active species. The support combined with S, W, P show low activity and high C〓 selectivity.

Na〓SO〓的加入促进了SiO〓晶型的转化，α-方石英是催化活性载体成分，而鳞石英没有甲烷氧化偶联反应活性。W和P的加入改善了C〓烃的选择性，抑制了SiO〓的深度氧化特性；W-O物种不是催化活性物种；由S、W、P及SiO〓组成的载体反应活性较差，但选择性较好；同时S元素对C〓烃的选择性的贡献有限。

At zygotene,t he SC formation initiated at multiple sites in each bivalent but the regions nea r telomeres were preferred.SCs were shortened with development of SCs.Initiation of new SC and extension of existing SC occured simultaneously,and pairing in di fferent bivalents of a nucleus was not synchronised.

结果表明，小麦SC以多点式起始方式于偶线期开始形成；随SC的发育，新的SC形成和已有SC片断的延伸并存；此外，在同一核内不同二价体之间，染色体配对和SC形成并不同步；SC成熟于粗线期，而以破碎方式解体，消失于双线期。

The a-ALDC can decarboxylate a-acetolactate directly to form acetoin without the formation of diacetyl.

ALDC可催化α-乙酰乳酸直接脱羧转化成乙偶姻，而不经过形成双乙酰的步骤。

1A series ofω-alkylmercapo acid were synthesized by two methods:one involved the reaction of the appropriateω-bromoalkyl acid with mercaptide under the presence of base;the other method was used only for the long alkyl compound by the reaction ofω-alkenyl acid and alkanethiol in the presence of AIBN.

正是基于以上考虑，本论文探索了合成下沿带有硫醚官能团，而上沿带有偶氮官能团的杯[4]芳烃衍生物的方法，进行了以下研究： 1采用ω-溴代羧酸和烃基硫醇在碱性条件下发生反应，或由ω-烯基羧酸和硫醇在AIBN的存在下反应，得到了ω-硫醚羧酸，使用氯化亚砜将羧酸转化为酰氯。

"I never thought I would be a star in a commercial, then this happened. It's very fortunate," Anas said.

阿纳斯说：&偶从没想过自己能拍广告，而这确实发生了，真是很幸运。&

Photochromic rate constant of G1 in CHCl3 and THF was 10－1 s－1, but that of photochromic liquid crystalline polysiloxanes containing azophenyl moieties was 10－8 s－1, thus the photoresponsitive rate of liquid crystalline dedrimer G1 is 107 times larger than that of the latter.

G1的光致变色反应速率常数的数量级为10－1 s－1，而含偶氮基元液晶聚硅氧烷的光致变色反应速率常数的数量级为10－8 s－1，因此液晶树枝状大分子的光响应速率比后者快107倍。

Photochromic reaction rate constant of G2 in CHCl3 and THF was 10－1 s－1, but that of photochromic side-chain polysiloxanes containing azophenyl moieties was 10－8 s－1, thus the photoresponsitive rate of the liquid crystalline dendrimer G2 is 107 times larger than that of the latter.

G2的光致变色反应速率常数的数量级为10－1 s－1，而含偶氮端基侧链聚硅氧烷的光致变色反应速率常数的数量级为10－8 s－1，因此，液晶树枝状大分子的光响应速率比后者快107倍。

I just hope that the day which I am going to buy ticket is warm and breezeless.

这里为什么是which 而不是when呢，个人觉得这里的the day 不能充当后面的宾语啊，所以偶觉得不应该用which

Sonnet 31Thy bosom is endearèd with all heartsWhich I, by lacking, have supposèd dead;And there reigns love, and all love's loving parts,And all those friends which I thought burièd.

你地胸怀有了哪些心而越可亲（它们的消逝偶只道已经死去）；原来爱，和爱的1切可爱部分，和埋掉的友谊都在你怀里藏住。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。