在两个进一步的实验中，科学家检验了幸运符对记忆和难题解决起的作用。
In two further experiments the effect of participant's lucky charms on both memory and puzzle-solving was tested.
当您访问 web 部署描述符中指定的文件夹时，您应该会遇到授权的难题。
You should receive an authentication challenge when you access the folder specified in your web deployment descriptor.
被Application Developer自动更新的部署描述符和其他文件，如果处于源代码控制之下，这对开发人员将是一个难题。
The deployment descriptor and other files that are automatically updated by Application Developer pose a challenge if these files are also under source control.
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