Tissues of many mature trees remain somewhat recalcitrant in response to most standard practices . 但许多成熟树木的基本组织对大部分标准实验来说，仍然有点棘手。
Here was a chance to take on really prickly job, show his stuff, and earn brilliant advancement . 现在有个机会可以担负起一件真正棘手的任务，一显身手，赢得破格的升迁。
Although the day had presented no taxing challenge, he had conducted himself with dignity and ability . 这一天，虽然没有遇到什么棘手的挑战，他的行为举止都表现了他的尊严和才干。
That was all the pancake specifications i could get that night. i didn't wonder that jackson bird found it uphill work . 那天晚上，我所能打听到的有关薄饼的细节只有这么些。难怪杰克逊伯德觉得棘手。
"it's a very ticklish business, mr. steger," put in the manager, yieldingly, and yet with a slight whimper in his voice . "这件事情很是件棘手的玩意儿，斯达格先生"，经理接着说，表示妥协，可是语气里还含着些呜咽的样子。
Miss glover suffered terribly from nervousness, and the notion of broaching so delicate a subject caused her indescribable tortures . 格洛弗小姐由于神经紧张而极度痛苦，那种认为要对非常棘手的问题担风险的想法使她感到有说不出的苦恼。
This alloy is a bit tricky as it sometimes may harden in the first twenty four hours after casting, becoming almost brittle, and produce cracks in the grid frames, etc . 这种合金制造有些棘手，因为有时铸造后24小时内硬化，几乎变得很脆，在板栅框等处产生裂痕。
Earnestly . you know how difficult it is 一本正经地不用说你也晓得会有多么棘手。
