unaccountably造句

1、He has been unaccountably delayed.
他被莫名其妙地耽误了。

2、The book unaccountably marked an epoch in my young life.
该书莫明其妙地成了我的童年生活中一个新时期的标志。

3、If you find yourself unaccountably laughing, for instance, you could be overdosing on manganese.
比如，如果你发现自己无缘无故地大笑，那可能是锰摄入过多。