So it is hard issue for whole SMT field.
对于整个表面贴装领域，都是个棘手的问题。
That's quite a hard issue for a young girl to come to terms with.
对于一个年轻的女孩来说是相当困难的问题。
The "harms" at issue are hard to identify, measure, and resist.
这个问题的“害处”尚难以界定、衡量或对抗。
Trying too hard was precisely my problem. It was the mind over matter issue again.
勉为其难正是我的问题所在，这还是我“人定胜天”的思想在作怪。
The senator was hard opposed by her rivals on the issue of social welfare.
那名参议员在社会福利问题上遭到对手强烈的反对。
Musicality, which is hard to define, is a major issue.
难以定义的音乐才能就是一个主要问题。
I must let you know that this was a very hard decision, but I had to take a bold step towards this issue because I have no further option.
我必须让你知道这是一个非常艰难的决定，但我要对这个问题大胆的一步，因为我没有更多的选择。
Neural network feature selection is an open issue hard to solve.
神经网络的输入属性选择一直是一个比较困难的问题。
Neural network feature selection is an open issue hard to solve.
神经网络的输入属性选择一直是一个比较困难的问题。
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