It is important that a lawyer should leave no stone unturned even on minor points and harp on the same subject to achieve a break through in an impasse.
兵士の食料が底をつきかけている。
The soldiers' food supply is running out.
彼女は絶望のどん底にあった。
She was in an abyss of despair.
彼女は幸福の絶頂から不幸のどん底へ突き落とされた。
She was dropped from the height of happiness into the depth of misery.
彼女は学生に英文法の基礎を徹底的に教え込んだ。
She grounded her students thoroughly in English grammar.