difficult to

difficult to的基本解释

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难以

与difficult to相关的网络例句 [注：此内容来源于网络，仅供参考]

Lanthanides belong to the sixth cycle of the periodic table Ⅲ B family, are all solid metal, they are La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, holmium, erbium, thulium, ytterbium, and lutetium were 15 kinds of metals and their periphery are two layers of electronic 5d16s2, while the peripheral third layer f orbital but never zero to 14, so the external electronic structure of 4f0-145d16s2, and therefore these elements in oxidation number are to 3, very close chemical properties, extraction, when it is difficult to separate them they are mostly multi-element mineral mix, more difficult to increase refining, and their atomic number of 57-71, one by one to increase the number of protons the nucleus, and thus extranuclear electron of gravity is also growing, so that atomic radius decreases with increasing atomic number Z, which makes lanthanides contraction, ionic radius is also reduced, which also makes Zr, Hf, Nb and Ta, Mo and W, the atom and ionic radius very close to each other they also determine a similar nature, resulting in difficult separation, also the tribe Ⅷ of the fifth cycle, ruthenium, rhodium, palladium, and the sixth cycle, osmium, iridium, platinum is very similar in nature, thus The six elements, said platinum group elements.

镧系元素属于周期表第六周期中ⅢB族，全部是固体金属，它们是镧、铈、镨、钕、钷、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥共十五种金属元素，它们的外围两层的电子均是5d16s2，而外围第三层的f轨道电子却从零增加到14个，所以外围电子结构为4f0－145d16s2，而使这些元素氧化数均为＋3，化学性质极为接近，提炼时很难分开，它们的矿石又大多是多种元素混在一起的，更增加提纯难度，它们的原子序数为57－71，核内质子数逐个增加，因而对核外电子引力也不断增强，使原子半径随原子序数Z增加而减小，这就使镧系元素收缩、离子半径也缩小，这也使得Zr和Hf，Nb和Ta、Mo和W等原子和离子半径都很接近、也决定了它们彼此性质类似，以致难以分离、也使第Ⅷ族中第五周期的钌、铑、钯和第六周期的锇、铱、铂在性质上极为相似，因而称这六个元素为铂系元素。

It is to carry out implement the central policy measure that urges support to be not state ownership economy to develop with the province, build environment of policy, market, legal system, government affairs, public opinion energetically, exert oneself solution is not state ownership economy to be born definitely it is difficult, difficult to live, development is mixed hard loan difficult question.

六是贯彻落实中心和省鼓励支持非公有制经济发展的政策办法，大力营造政策、市场、法制、政务、舆论环境，着力解决非公有制经济出生难、生存难、发展难和贷款难新问题。

In other words, if middle-class Americans continue to struggle financially as the ultrawealthy grow ever wealthier , it will be increasingly difficult to maintain political support for the free flow of goods, services, and capital across borders.

注：这句话中是不定式短语to maintain 做主语的用法，英语用法中多数用it做先行主语而把不定式放到句子后部去。

与difficult to相关的网络解释 [注：此内容来源于网络，仅供参考]

an attempt to do something especially when it is difficult to do：艰难的尝试;试图;尽力

an attempt to do something especially when it is difficult to do 艰难的尝试;试图;尽力 countable ~ (to do sth) | to make a determined/real/special effor... | The company has laid off 150 workers in an e...

I preferred to be assigned something more difficult to do：我宁愿被分配(得到)些更困难的工作做

3. You are bound to be received warmly. 你定会受到热情... | 4. I preferred to be assigned something more difficult to do. 我宁愿被分配(得到)些更困难的工作做. | 5. He was often spoken about. 他常被人们...

She finds it difficult to open out to people：她感觉很难与人们无拘无束的交谈

More power to you.祝你成功 | She finds it difficult to open out to people.她感觉很难与人们无拘无束的交谈. | She is kissing up to her aunt.她讨好她的阿姨.