Any large traversing of the main gun had to be done by moving the entire vehicle.

任何主炮的大范围横向移动都需要整个车体进行运动。

youdao

Its armor was streamlined but more importantly, it featured a long-barreled 57mm main gun.

它的装甲是流线型的，而且更重要的是，它有一个57毫米的长管主炮。

youdao

The 105mm main gun of the tank destroyer is capable of engaging lightly armoured vehicles and fortifications, but is unable to destroy a heavily armed main battle tanks (MBT).

坦克歼击车105毫米主炮能够打击轻装甲车辆和防御工事，但是不能摧毁一辆全装甲主战坦克（MBT）。

youdao

But the National Rifle Association (NRA), the main gun lobby, vastly prefers him to Mr Obama.

ECONOMIST: The Nine strike down a gun ban and delight the firearms lobby

The bipartisan deal, which will be offered as the first amendment to the main gun bill, would require all people buying firearms online and at gun shows to undergo a background check through a licensed dealer, who would be required to keep a paper record of the sale.

WSJ: Gun Measure Clears Senate Hurdle

The BBC's Tomas Fessy, in Gao, says Sunday's gun battle appears to have started around the main police station in the town centre, but there is now heavy gunfire coming from different areas.

BBC: Heavy gunfire in northern Mali town of Gao