質問: 日本語訳をお願いいたします。 other 18-pounders searched and swept the area from the german trenches to 250 yards (230 m) further back in succession, as the british infantry reached and attacked them. the rest of the 18-pounders fired standing barrages on each line of trenches, until the creeping barrage arrived then lifted with it. a protective barrage was then formed beyond the objective, according to the barrage timetable. a thaw set in on 16 february and next dawn, there were dark clouds overhead and mist on the ground, which turned soft and slippery before reverting to deep mud. the speed of the creeping barrage had been based on the infantry crossing frozen ground and was too fast for the conditions. at 4:30 a.m. the german artillery bombarded the front from which the british were to attack, apparently alerted by a captured document and a deserter.
回答: >other 18-pounders searched and swept the area from the german trenches to 250 yards (230 m) further back in succession, as the british infantry reached and attacked them. the rest of the 18-pounders fired standing barrages on each line of trenches, until the creeping barrage arrived then lifted with it. a protective barrage was then formed beyond the objective, according to the barrage timetable. ⇒他の(半分の)18型ポンド砲隊がドイツ軍の塹壕から連続的に250ヤード(230m)後退しながらその地域を捜索して一掃し、それと同時に英国軍歩兵連隊が塹壕まで達して攻撃を加えた。残りの(先発の)18型ポンド砲隊が塹壕の各戦線ごとの掃討射撃でそれをハチの巣状(ボコボコ)にするまでに至って、それから引き揚げた。その時、集中砲撃の工程表に従って、(攻略した)標的を(管轄下で)保護するための集中砲撃隊が形成された。 >a thaw set in on 16 february and next dawn, there were dark clouds overhead and mist on the ground, which turned soft and slippery before reverting to deep mud. the speed of the creeping barrage had been based on the infantry crossing frozen ground and was too fast for the conditions. at 4:30 a.m. the german artillery bombarded the front from which the british were to attack, apparently alerted by a captured document and a deserter. ⇒2月16日から翌日の夜明けにかけて雪解けが始まったが、頭上に暗雲、大地に霧があった。大地は、深い泥地に戻る前に柔らかくなり、ぬるぬるしていた。掃討射撃が凍結している(はずの)大地を渡る歩兵に基づいていたので、現実の条件よりそのスピードが速すぎた。午前4時30分、英国軍が攻撃することになっていた前線からドイツ軍の砲兵隊が砲撃してきたが、それは明らかに、押収した文書や脱走兵の発した警報を得て(察知して)のことだった。 ※この文章は、全体的に(特に、両段落とも最後の文の)構文や内容がよく分かりません。誤訳の節はどうぞ悪しからず。