Hints：
只听写例句。前面的单词不用听写。
这一期有两个例句哦。Logs were piled up and burned in the open, and the ashes collected.
During this time, the vessel logged 600,000 kilometers and took almost 20,000 core samples of seabed sediments and rock at 624 drilling sites around the world.
发表于 2016-8-2 11:29:20