broaching

基本解释

When broaching the topic of smoking, always use a positive tone.
谈论关于吸烟的话题时，请记得使用正面的表达方式
Broaching the topic at the wrong time could cost you the job -- or thousands of dollars.
如果在不恰当的时机提了这个问题可能会让你损失这份工作或几千美金。
His referendum to amend slightly the law on abortion was shot down, his referendum to bring in divorce resoundingly defeated; but he had succeeded in broaching the subjects in a civil way.
他提议对有关堕胎的法律做少许修改被公民复决否定，他提议引进离婚判决也被公民复决彻底击败，但是在以民事形式提出这一议题讨论中他成功了。

That seemingly harmless suggestion triggered a vitriolic response: Hundreds of angry letters poured in excoriating Nixon--and us for broaching the idea.
FORBES: These Numbers Don't Figure
Prosecutors concede Hassoun did waffle about his plans, allegedly talking about profiting monetarily and then broaching the idea of poisoning Lake Michigan or assassinating Daley.
NPR: Would-Be Chicago Backpack Bomber Gets 23 Years
Of course, of course, only on condition that you do not object in any particular way, even a tiny bit, to my broaching this delicate subject?
NEWYORKER: Heirs

When you broach a subject, especially a sensitive one, you mention it in order to start a discussion on it.
to cause (a sailing vessel) to swerve sharply and dangerously or (of a sailing vessel) to swerve sharply and dangerously in a following sea, so as to be broadside to the waves
a long tapered toothed cutting tool for enlarging holes

马杠扩孔
But in the analysis of broaching, the assumptions that it is plane strain, simulations of broaching are implemented.
在马杠扩孔的分析中,首先在假设其为平面应变的条件下,对扩孔过程进行定量的分析。
机械工程
拉削
拉孔
拉刀切削