Rockingham  reached Whampoa on 23 May , and arrived at Bombay on 21 September .
Rockingham  reached Whampoa on May 23 and arrived in Bombay on September 21 .
Rockingham  reached Whampoa on May 23 and arrived in Bombay on September 21 .
解释一下句子: Rockingham  reached Whampoa on 23 May , and arrived at Bombay on 21 September . 输出: