证明是

As the origin of tea, the development ofChina's tea industry has been proved as the most thriving advantageous industry afteryears' experience of up and down.

而作为茶叶的故乡，中国茶叶产业的发展也经历了几千年的兴衰沉浮，被历史证明是具有旺盛生命力的优势产业。

Cancer is a kind of persistent ailment.

我们的木材供应证明是不够的。

Beijing, with spring in the air, welcomes tourists both at home and abroad to come and visit here

你方提供的证明是不充分的，因此我方不能考虑你方的索赔要求。

Pope Alexander VI's endeavour to reconvert the Brethren (in 1499) proved futile.

教皇亚历山大六世在尽力reconvert兄弟（ 1499 ）证明是徒劳的。

There is something wrong about his alibi.

他的不在场证明是有问题的。

Among these methods, alkali treatment is proved to be economical, simple, and effective.

在这些方法，碱处理的证明是经济，简单，有效。

A: The rookies this year in NBA turn out to be the best players in the All Star game.

今年的 NBA 全明星赛中，一年级生被证明是最好的。

Exercise is also proven to be an alleviator of depression as it can act as a mood enhancer.

演习也被证明是一alleviator抑郁症的，因为它可以作为情绪增强。

A high-order alternating direction implicit method for solving two or three dimensional heat equations is proposed. The method is fourth order in space and second order in time.

提出了数值求解二维和三维热传导方程的高精度交替方向隐式方法，其空间为四阶精度，时间为二阶精度，并通过Neumann方法证明是无条件稳定的。

However, in this type of setting, most effects turn out to be ambiguous.

然而，在这一类的模型设定中，有大量的效应，被证明是模糊不清的。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐