石墨层中的碳原子相互连接形成碳环。In graphite sheets, carbon atoms bond together in rings.他正在环礁湖里与一只短吻鳄搏斗。He was grappling with an alligator in a lagoon.赢得观看环法自行车赛最后阶段比赛之旅！Win a trip to see the finish of the Tour de France!...
我们多年来都开着一辆生锈的旧货车四处旅行。We spent years travelling around in a rusty old van.闪电在货车周围炸开时，情景异常壮观。It was unbelievably dramatic as lightning crackled all round the van.马撞在货车上发出砰的一声巨响。There was a loud thump as the horse crashed i...