查询词典 difficult to ascertain

It becomes difficult to ascertain whether or not a character is a delimiter or a data item, and by using a printable character such as a colon as a delimiter, you are limiting the number of allowed characters in your data, which may not be desirable .

用可打印的字符串比如冒号来作定界符，将会很难分辨一个字符到底是数据还是定界符。而且还会限定你能用在数据项里面的字符数量，而这不是你想要的。

Thus, when a child has an adverse reaction to the shot, it is often difficult to ascertain which component of the vaccine (or of the several simultaneously administered vaccines) was responsible.

因此，当一个孩子对于注射有有害反应的时候，经常难以确定疫苗的哪一部分出了问题。

Moreover the vitrification temperature T of the composite of wheat straw-PVC is a difficult to ascertain.

聚氯乙烯树脂的T接近70℃，而在麦秸与聚氯乙烯树脂复合后的T很难确定。

Moreover the vitrification temperature Tg of the composite of wheat straw-PVC is a difficult to ascertain.

聚氯乙烯树脂的Tg接近70℃，而在麦秸与聚氯乙烯树脂复合后的Tg很难确定。

My national calamity employs reserve to occupy onshore ascertain to did not employ the 1/4 of reserve to control, how to open rise in revolt to employ reserve to have important sense to safety of our country oil, it is difficult that the carry of small oily company serves as triumphal oily area the development that employs reserve provided valuable experience.

我国难动用储量占陆上探明未动用储量的1/4左右，如何开发难动用储量对我国石油安全具有重要意义，胜利油区小油公司的运作为难动用储量的开发提供了宝贵的经验。

Thus it has been difficult to ascertain whether the acellular vaccine is truly safer.

因此难以得出非细胞疫苗是否真的安全的结论。

Therefore, the true origin of any piece of wood packing material is difficult to determine and thus its phytosanitary status cannot be ascertain ed.

因此，所有木质包装材料的真实原产地难以确定，从而使其植物检疫状况也不能确定。

Now,the widely used methods of survey are affected by a number of factors,it is difficult to ascertain the exact space location of changed map spot.

0引言土地调查是以查清土地的数量、质量、分布、权属、利用现状、动态变化和规律的一项技术和管理措施。

One of the predicaments of rich people is that they find it difficult to ascertain if their friends are true to them or their money.

有钱人的烦恼之一就是，他们很难确定身边的朋友是真心对待自己，还是仅仅为了钱而和自己交往。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。