Russia expresses regret for those lost in the hostage incident.
Don't obtain wealth at the expense of your conscience.
I've steeled myself to face a certain amount of sacrifice, effort and hardship if that's what it takes to fulfill my dream.
The soldier saved his friend at the cost of his own life.
The artificial satellite launched at the cost of the welfare budget did not work properly.
They are victims of the so-called war.
She passed the test at the expense of her social life.
She went out on a limb defending him, and now she has lost her job.
She brought up her child at the cost of her life.
She gave up everything for her children.
She worked at the cost of her health.
They won the battle at the cost of many lives.
They made many sacrifices to get their own house.
He fell a victim to his own ambition.
He rescued the little girl at the cost of his life.
He rescued the little girl at the cost of his life.
He paid too high a price for success.
He saved his daughter from the fire at the cost of his own life.
He saved her at the cost of his own life.
He saved the drowning child at the cost of his own life.