你怎么将一句话拆开，变成两个问题来问呢？ 连在一起是：The country has already sent up three unmanned spacecraft , the most recent having launched at the end of last march. 句子的前半部分是主句。句子的后半部分有错，应该是the most recent having 【been】launched at the end of last 【month】，是独立主格结构，相当于：the most recentunmanned spacecraftwas launched at the end of last mont...
