All Artillery Shells have been depleted.
火炮炮弹已经用尽。
For ammunition to break through, artillery shells need to be hardened by adding certain minerals to the steel.
为了让炮弹能够打穿,弹壳的钢里需要加入一定的矿物质来增加硬度。
Hopper and Aiken (also USNR) used the Mark I to help the Navy produce tables for aiming artillery shells and bombs in the closing year of World War II.
在第二次大战结束的那一年,霍珀和艾肯(还有usnr)使用Mark I帮助海军制作用于火炮瞄准的计算表。
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