短语讲解：

1. Sanders had support from minorities and young voters, according to pollsters.

according to 根据，按照
例句：According to her, grandfather called at noon.
据她说,祖父在中午打来电话。

2. A total of 1,237 GOP delegates are needed for nomination.

a total of 总数为
例句：Their expenses reached a total of 1, 000 pounds.
他们的花费总计1000英镑。