414. 那男孩大约八九岁。

[误] The boy was about eight or nine years old.

[正] The boy was eight or nine years old.

注：about 意为“大约”，three or four o\'clock（三点或四点/三四点钟）；eight or nine years old 也是表示“大
约”的时间，因此再用 about 就重复了。