不可多得

It's a work of art!

这是一件不可多得的艺术品。

It is the only speciality book written bilingually in the field of clinical cytology, and may be a rare reference book for the reading public of fundamental and clinical medical sciences in need of training in special English as well as beneficial to communication with international colleagues.

头颈部病变临床细胞学》的另一大特色是对所述疾病作了汉英文两种语言互译对照，实为临床细胞学领域中惟一双语言编排形式的专业书，可成为当前基础医学与临床医学中需要专业英语训练和写作之广大读者不可多得的参考书，并有利于与国际间业内学者的交流。

The concrete work include: First, we consult a lot of herbarium specimen from PE, NAS, IFP and XJA etc.; Second, we collect more than 100 species of Brassicaceae from Xinjiang, Jilin and Shandong; Third, we study the phylogeny of Brassicaceae from China to approach some divergence on the tribe, genera and species of Brassicaceae using many ways including morphology, micromorphology and molecular systematics, furthermore, estimate the significance of every index.

2确定了两种模式植物-拟南芥与盐芥的系统学位置和系统学关系，认为两者分别归于拟南芥属和盐芥属，其亲缘关系较远，拟南芥属靠近须弥芥属、荠属、亚麻荠属、旗杆芥属、无苞芥属、糖芥属以及垂果南芥等，而盐芥属靠近山嵛菜属和沟子荠属，对于它们的深入认识，为两种模式植物在进化领域研究物种抗逆适应与趋异分化提供了一个不可多得的比较模式系统，以及更多可供比较的物种，具有重要的应用价值。

The main products have flower radish kimchi spicy cucumber cotyledon Su Campanulaceae small eggplant garlic and sweet chili sauce, such as bracken more than 20 varieties, taste pure, fresh and delicious, memorable, people sat at the table is a rare delicacy.

主要产品有辣白菜辣花萝卜小黄瓜小茄子苏子叶桔梗辣酱甜蒜和蕨菜等20余个品种，味道纯正，鲜嫩可口，回味无穷，是百姓餐桌上不可多得的美味佳肴。

Collin has almost classic head detail and perfect sweet expressions.this is rare even in U.S.

柯林拥有完美的头版和异常甜美的表情，这即使在强手如云的Overland，也是不可多得的。

Use methods such as taking off protein,calcium,colour,deacetylate and purification to abstract and preparing chitin and chitosan from Xuyu's local lobster shell.The technology,equipments,operation are simple and have strong popularization.

用本法从地产盱眙龙虾的虾壳中提取甲壳素和制备壳聚糖工艺设备简单，操作简易，具有较强的推广性；地产盱眙龙虾的虾壳含甲壳素较高，是一种制备壳聚糖不可多得的天然资源，值得开发利用。

The other technical indexes are also accordance with document.conclusion:use methods such as taking off protein,calcium,colour,deacetylate and purification to abstract and preparing chitin and chitosan from xuyu's local lobster shell.the technology,equipments,operation are simple and have strong popularization.the chitin abstracted from xuyu's local lobster shell is rather high,it's a natural resources to prepare chitosan and is worth to exploit and utilize.

用本法从地产盱眙龙虾的虾壳中提取甲壳素和制备壳聚糖工艺设备简单，操作简易，具有较强的推广性；地产盱眙龙虾的虾壳含甲壳素较高，是一种制备壳聚糖不可多得的天然资源，值得开发利用。

A sea of stones and a stretch of caves in Xingwen is a rare karst park with world -class karst cave and doline. Its distinctive landscape distribution forms a very magnificent and very wonderful natural landscape.

兴文石海洞乡是不可多得的喀斯特公园，其洞穴与漏斗都是世界级的，独具一格的景观配置，构成了一幅世界上极为壮观、极为独特的自然奇观。

It is diicult to get an ecotypic natural environment, while the layout of an ecotypic city is creative and with class.

生态的自然环境不可多得，生态环保的城市建设规划则充满了创新和大气。

Why moved, the past events although cannot reperform, actuallyalso is rare wealth, it can give you very to enlighten, when feelssad, you may seek the joy which that share passes; When is lonely, youwere allowed to seek that once with good friend's warmth.............

何必伤感，往事虽不能重新上演，却也是一笔不可多得的财富，它能给你很多启迪，当心酸时，你可以寻找那份逝去的快乐；当孤单时，你可以寻找那份曾经与挚友的温馨。。。。。。。。。。。。。

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％。