Tanks are heavy on fuel, destructive to roads and difficult to park.
坦克耗油量大，对道路有破坏性，并且难以停放。
They breathe through uncomfortable respirators or carry heavy oxygen tanks on their backs.
他们或通过防毒面罩，或携带沉重的氧气瓶进行呼吸。
Mallorys tanks, however, were heavy and often broke down.
然而，马洛里的氧气筒既沉重又经常故障。
Mallorys tanks, however, were heavy and often broke down.
然而，马洛里的氧气筒既沉重又经常故障。
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