difficult to

difficult to的基本解释

-

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]

When the mind apprehends the essence of a thing (quod quid est; tò tí en enai), the external object is perceived without the particular notes which attach to it in nature, and it is not yet marked with the attribute of generality which reflection will bestow on it.

当铭记apprehends的本质的东西（狱吏嚼1-5 ；德州仪器恩enai ），外部对象被认为没有特别注意到它重视它的性质（中存在singularibus ），这是没有标明属性一般性的反映将赋予它

It is difficult to enter the path of exertion, it is difficult to do, difficult to maintain.

"精进努力是一条艰难的道路，难以通过，难以成功。"

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。

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

Difficult is having umpteen phone calls from vendors with wedding questions：不满意就是接了 无数个询问婚礼的电话

Difficult? You know what difficult is?|不满意? 你... | Difficult is having umpteen phone calls from vendors with wedding questions...|不满意就是接了 无数个询问婚礼的电话 | ...that I can't answer.|但我根...

bad-looking, boring, difficult：很不好看

很好看"very good-looking, very interesting, very easy" | 很不好看bad-looking, boring, difficult | 都很不好看"all bad looking,all boring, all difficult"

difficult voidings of white urine：小便难而白

小便难 difficult urination | 小便难而白 difficult voidings of white urine | 小建中汤 Minor Center-Fortifying Decoction