The most intractable pain often occurs when the nerves themselves are damaged.神经本身受损时, 常会出现最难治愈的疼痛。

Longer-term assistance is given to countries with more intractable problems.为面临更多难题的国家提供更长期的援助。

He protested, but Wright was intractable.他提出异议, 但赖特依然不改。