连接: to link, to join, to attach, connection, a link (on web page)...
阻拦: to stop, to obstruct...
以内: within, less than...
旋律: melody...
第一线: front line, forefront...
何时: when...
背包: knapsack, rucksack, infantry pack, field pack, blanket roll...
敢: to dare, daring, (polite) may I venture...
