The introduction of rifling, or cutting grooves, into a barrel had already improved accuracy, but the weapons remained difficult to load and clean.
人们将来复线（膛线）引入枪管之后提高了射击的精确度。 但是装弹和清膛仍然很麻烦。
They typically turn in well after midnight, then get up just a few hours later and barrel through the day without needing to take naps or load up on caffeine.
他们通常午夜过后才上床睡觉，几个钟头之后就起床干活，无需小憩一下或靠咖啡因提神就能度过整整一天。
The barrel shape structure work like an overhanging beam and when subjected to earthquake load, its dynamic stress of outer frame is greater than that of inner tube.
超高层筒体结构近似悬臂梁弯曲受力构件，在动力作用下，外框剪力墙的动应力反应要大于核心筒墙的动应力反应。
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