On display are earrings, necklaces and bracelets made from jade, amber and amethyst.

展出有用玉石、琥珀和紫水晶做耳环、项链和手镯。

There isn’t a bottomless pit of money for public spending.

并非有用之不尽钱用于公共开支。

The computer is ever such a useful tool.

计算机是一种非常有用工具。

He dished up a lot of useful facts and figures.

他拿出了许多有用事实和数据。

The minister has piloted several useful bills through Parliament.

这位部长设法使几项有用法案得以在国会通过。

Designing colleagues stopped them from promoting me.

有些别有用心同事阻止他们提拔我。

There is a useful bibliography at the end of each chapter.

在每一章后附有一份有用书目。

The proposed troop reductions were a useful bargaining counter in the disarmament talks.

裁减兵员提议是这次裁军谈判中一个有用讨价还价筹码。

Chemicals in the body break our food down into useful substances.

人体中化学元素把食物分解成有用物质。

These are useful in hard rock mining where high brisance, high shattering effects, are desired.

这种炸药，对威力、破碎效应坚硬岩石矿，是有用。

An unerring faculty for detecting hypocrisy is one of her most useful attributes.

能无误地看出伪善能力是她身上最有用特征之一。

These case studies show that s mall subject vocabularies are useful for these community-oriented services, and that maintenance is a crucial issue for the development and use of the vocabular ies.

从这两个案例可以 看出小型主题词表对专业服务是非常有用，并且维护工作对词表建立和应用是至关紧。

Pyridine can react with halogens,nitronium fluoroborate, sulfur trioxide, boranes and chromium trioxide to form some useful organic reagents which are introduced briefly in the paper.

吡啶可以和卤素、硝基四氟化硼盐、三氧化硫、硼烷及三氧化铬反应，形成一些有用有机试剂。

This is the very best way to leverage an understanding of conative style -- to create useful, complementary strategies instead of disheartening, competitive ones.

这就是理解”意动风格“最好方法--去创造有用、互补策略，而不是采取使人气馁、竞争策略。

The distinctives of Reformed theology and practice are useful only to the degree that they undergird and clarify the gospel, the evangel.

改革宗神学与实践特点是很有用，但也只在一个程度上，即加强并澄清福音与福音点。

It is much advantageous to get secondary metabolin by eumycete fermentation, and will be a important way to produce the metabolin.

真菌发酵应用于有用代谢产物生产具有很多优点, 因此必将成为未来获得大量真菌有用代谢物一种重方法。

R-mode factor analysis has proved very useful in distinguishing geochemical data, clearly dominated by anthropogenic in comparison to geogenic sources.

型因子分析已被证明在鉴别地球化学资料方面是非常有用，它主导着人为成因和地球成因来源对照。

Abstract： The C5 Fraction derived from ethylene steamcracker contains some very useful components, isoprene, cyclopentadiene and piperylene.

摘 ： 来自裂解乙烯C5馏份含有非常有用化工原料——异戊二烯、环戊二烯、戊间二烯。

Shoemaking is a useful trade.

做鞋是一种有用手艺。

He mentioned a useful book.

他说出一本有用书名字。