物物交换

Yet as odd as MacDonald exchange was, barter is now big business on the Net.

然而，奇怪了麦克唐纳的交换，以物易物现在大企业上了网。

Yet as odd as the MacDonald exchange was, barter is now big business on the Net .

然而，尽管麦克唐纳交换显得古怪，以物易物现在已是网上的一个大生意了。

Miao is well-known for their use of various wild fibers. In Miao' s daily life, on the one hand, Cannabis sativa L. becomes a medium between Miao and the natural environment with the development of traditional processing technologies; on the other hand, clothing made of Cannabis sativa L. is often regarded as gift exchanged between different individuals and clan members in certain occasions. Meanwhile, it can also be used as a kind of commodity in exchange of grains and other daily necessities in market.

苗族原来就有着长期使用各种野生纤维的传统，自从麻进入苗族的生活中以后，一方面，通过苗族刀耕火种传统知识的加工改造，火麻充当了苗族与自然界进行能量交换的中介物；另一方面，用火麻织制的麻布及服饰，往往被选择作为礼物，被不同个体和宗族成员在一些特定场合下相互赠送，同时也充当商品，从市场换取粮食和其他生活用品，是个体与社会进行多个角度，多个层次的连接和转换的媒介物。

The complexes were characterized with variable temperature magnetic susceptibility (4-300 K). The exchange integral J =-4.39 cm-1 for [CuCo(NO2-Phen)2] and -3.59cm-1 for [CuCo(NO2-Phen)2]. A weak antiferromagnetic superexchange interaction operates between the metal ions.

测定了配合物(4-300K)的变温磁化率，并用最小二乘法和自旋Hamiltonian算符，H=2JS1.S2-DSzl导出的磁方程拟合，求得交换参数为J=-4.39和-3.59cm^-^1，表明两个Cu-Co双核配合物中有弱的反铁磁性超交换相互作用。

The thicker the DBL is, the stronger the inhibition will be. Thus, the presence of DBL in a polder reservoir can result in a delay of natural clearing process of polluted water. The effect of salt release from deposited sediments on the water quality will be a long lasting process.

另外，由于扩散边界层的存在，限制了水动力对沉积物与上覆水之间物质交换的增强作用，所以海湾水库沉积物中蓄积盐分对上覆水的影响将是长期的过程。

An exchange of one thing in return for another, especially relinquishment of one benefit or advantage for another regarded as more desirable

交易，交换以一物换取另一物，尤指放弃一种利益或优势以换取另一种被认为更有价值的物品

Others will return to bartering and trading for what you need in order to subsist.

其他人则会回归到彼此交换和以物易物的状态，以满足维生。

Charlie and I, it should be emphasized, believe that true trade – that is, the exchange of goods and services with other countries – is enormously beneficial for both us and them. Last year we had $1.15 trillion of such honest-to-God trade and the more of this, the better. But, as noted, our country also purchased an additional $618 billion in goods and services from the rest of the world that was unreciprocated.

当然必须强调的是，查理跟我都相信，真正的贸易，也就是与他国交换货当然必须强调的是，查理跟我都相信，真正的贸易，物与服务的行为，对于彼此都有相当大的益处，物与服务的行为，对于彼此都有相当大的益处，去年光是这类的贸易总额就达1.15兆美元，但除此之外，我们另外又向外国多采购了6，180亿美元兆美元，但除此之外，我们另外又向外国多采购了就达兆美元亿美元的产品与服务，这笔居高不下的数字将引发严重的后果。

The amniotic fluid and allantoic fluid of chicken embryo have been analyzed and the resonances of most substances in them were assigned by 1-dimention and 2-dimention Nuclear Magnetic Resonance methods. This work could be the basis of quantitative analysis of metabolites and studying the metabolites changing between the amniotic and allantoic fluid during the hatching process. Also, it provided a new way to study the process of embryo developing.

用一维及二维液体高分辨核磁共振(Nuclear Magnetic Resonance，NMR)方法综合分析了鸡胚羊水和尿囊液的成分，对其中的大多数谱峰进行了归属，发现了一些未经报道的小分子代谢物，为研究胚胎发育过程中各个胚囊中体液的交换和小分子的代谢以及进一步对发育过程中代谢物含量变化的定量研究打下了基础，并为研究胚胎发育的过程提供了新的思路。

During incubations, significant uptake fluxes of NO(superscript - subscript 3) and SiO(superscript 2- subscript 3) were commonly shown at the sediment-water interface, and largely controlled by their concentrations in the overlying water. The molecule diffusive fluxes, calculated from the concentration gradients between overlying water and surface pore water, seemed not so important in the exchange fluxes.

沉积物－水界面交换过程在春季表现为对NO(上标-下标 3)和SiO(上标 2-下标 3)的吸收，吸收的量在很大程度上取决于上覆水中这两种营养盐的浓度；由上覆水和表层间隙水浓度梯度所决定的分子扩散通量对实际交换通量的控制有限。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷