delved
v.
深入探究，钻研( delve的过去式和过去分词 );
例句:
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She delved into her rucksack and pulled out a folder.
她在背包里翻找一番后拿出了一个文件夹。
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We delved through a sackful of letters to draw the winning name.
我们把手探进一袋信件中抽取获奖者。
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She delved in her handbag for a pen.
她在手提包里翻找钢笔。
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Dwarves...had delved for themselves great halls and mansions...in the...Ered Luin.
来自Tolkien
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That's something you interestingly haven't delved in to.
来自SA
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Stimulated by their conversations, Zhang delved into piles of architecture books.
来自NEWYORKER