adj. unattainable ; rare
misc. un-come-at-able ; hard-to-get
中国人从中东获得了一种蓝色颜料,这是一种当时在中国很难得到的纯净的氧化钴,这种颜料只含有少量的锰。
From the Middle East the Chinese acquired a blue pigment—a purified form of cobalt oxide unobtainable at that time in China—that contained only a low level of manganese.
由于它大部分都不受监管,可靠的统计数据是很难得到的。
Since it is largely unregulated, reliable statistics are hard to come by.
我们想要高兴,但是我们却认为那是挣来的,应得的,很难得到的。
We want to be happy, but we think it should be earned or deserved or hard to come by.
And I do that very precisely because it'll teach you a little bit about how easy or difficult it is to do it and what kind of information you retrieve from a dietary assessment.
我这样要求是因为,这能教给你,做评估的难易程度,以及你们能从饮食评估中得到何种信息
应用推荐