因为FindBugs不知道map是否包含“bob”，所以它将第5行标记为可能null指针异常。

Because FindBugs doesn't know if the map contains "Bob" or not, it will flag line 5 as a possible null pointer exception.

youdao

要在查询元素表中将行标记为列定义，行的Operator选择对升序必须为asc，对降序必须为DESC。

To mark a row within the query elements table as a column definition, the Operator choice for the row must be either asc for ascending or desc for descending.

youdao

测量员从海岸向内陆行进数千英里，每增加几英尺就停下来测量海拔，每增加一英尺就用两根杆子做标记。

Surveyors marched inland from the coast for thousands of miles, stopping at increments of as little as a few feet to measure their elevation, and marking each increment with two poles.

youdao