查询词典 protected

E.It is protected by a siliceous case.

它被硅酸的环境所保护着

The synthesis of the pentacyclic skeleton of Et-743 and the construction of the five chiral centers thereof.1. The core pentacyclic skeleton of phthalascidin was constructed with L-dopa as the starting material via thirteen steps. First, two basic synthons, the C-1 functionalized tetrahydroisoquinoline compounds 8 and N-protected Z-dopa derivative 9, were prepared from L-dopa. They were coupled via amide bond to form the dipeptide compounds 10, which were the first key intermediates. Then the primary hydroxyl groups were transformed into the corresponding amino aldehydes 11 via Swern oxidation. Followed by the intramolecular Pictet-Spengler cyclization, the pentacyclic compounds 12 were synthesized.

五环骨架的构建及五个正确手性中心的确立：1.1我们以L-多巴为起始原料，经过多步官能团保护和转化合成了基本结构单元8然后和苯丙氨酸衍生物9，通过缩合反应生成酰胺中间体10，经Swern氧化得到醛化合物11，然后再次利用分子内改良的Pictet-Spengler反应一步构建c，d两环，得到五环骨架化合物12，最后，实现了21-位羰基向氰基的转化，得到了C-1位官能化的化合物14，化合物14不但具有和Et-743一致的五环骨架，而且分子中五个手性中心立体构型也与其完全相同：其中，3，位和13，位的手性中心由原料L-多巴带入，而1，位，11，位和21，位手性中心则通过不对称诱导而确立。

We love the swing out stand but miss the slip-on hard cover that protected the Nokia 770's display and put it to sleep.

我们爱得如火如荼出站，但错过滑硬外壳保护，诺基亚770的展示，并付诸睡觉。

Protected by a slipcover, the main camera has 3,200,000 pixels and can capture continuously.

主摄像头是320万像素，有滑盖保护，而且具有连拍功能。

Taking his place amid this lightsome atmosphere, he would stand, his stocky figure cloaked in a great cape overcoat, his head protected by a broad slouch hat, awaiting the applicants who had in various ways learned the nature of his charity.

他在这个轻松愉快的环境中找到了自己的位置，就站在那里，魁梧的身上披着一件带斗篷的大衣，头上戴着一顶阔软边呢帽，等待着那些通过各种渠道了解到他的慈善事业的性质的申请者。

The Great Smoky Mountains, created in 1934 in parts of North Carolina and Tennessee, comprise one of the largest protected land areas in the eastern United States.

大烟山国家公园创建于1934年，位于北卡罗来纳州和田纳西州的交界处，是美国东部最大的陆地保护区之一。

When he arrived at Delphi, the site was already occupied by the cult of the mother goddess Ge and protected by her son, the snaky god Pytho.

当他抵达德尔福，该网站已经占领了邪教的母亲女神葛和保护她的儿子， snaky上帝pytho 。

It is the only protected area in the world to incorporate a continuous, intact transect from snowcap to tropical marine environment, including extensive lowland wetlands.

占地面积250万公顷，是东南亚最大的保护区，也是世界上唯一一个既包括雪地又有热带海洋，以及延伸的低地和沼泽地的保护区。

G upload, post, publish, transmit, reproduce, or distribute in any way, any component of this Software itself or any Information obtained through this Software which is protected by copyright, or other proprietary right, or create derivative works with respect thereto, without our prior written permission unless otherwise specified by us in this Software or pursuant to separate licence granted by us

g 未得我们书面批准﹙除非我们在本软件中另有订明，或我们另外给予特许﹚而上载、张贴、发布、传送、复制或以任何方式分发本软件任何元件或通过本软件取得的任何受版权或其他专利权保障的资料，或创立衍生作品；阁下对该等资料并不拥有任何权利，除该等使用条款所允许者外，以及/或除我们另外给予特许外，阁下不得另外使用该等资料。

Glycine soja is a protected plant under grade two in China and it only distributes in East Asia.

野生大豆为我国二级濒危保护植物。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。