Under the perfect condition, supposes fire as line fire, applying discrete regularization method into the inversion of coal mine concealed fi.

在理想状态下，假定火源为线火源，采用离散正则化方法对矿井隐蔽线火源进行反演。

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He cheerfully blows away any bad guy stupid enough to get in his line of fire.

他兴高采烈地将那些蠢得跑进他发射线内的任何坏蛋炸死。

《柯林斯英汉双解大词典》

Fire crews refused to cross the picket line.

消防人员拒不冲破围厂队伍人墙。

《牛津词典》

With hand tools, he and Rufus Robinson threw dirt on the fire and dug a line to contain it so the flames would not spread.

VOA: special.2009.11.24

Tam Macfarlane, who represents the union in Somerset, said the plans would see 16 operational firefighters made redundant at front-line fire stations.

BBC: Devon and Somerset firefighters threaten legal action

Increasingly, she is in the line of fire in an undeclared, unacknowledged running battle.

ECONOMIST: Domestic labour

Juan wedged the Humvee right into the line of fire, using the vehicle as a shield.

WHITEHOUSE: The White House