spell
单词辨析：
指发展或变化过程中的某一个阶段。
The building is in the design phase.
这栋大楼正处于设计阶段。
The critical phase of that experiment will last three months.
那个实验的关键性阶段将持续3个月。
指有开始和结束的一段时间。
His studies improved in a very short period of time.
他的学业在很短的时间里便取得了进步。
New employees have been trained over a six-week period.
新员工接受了为期6周的培训。
指某种活动、天气、疾病等持续的一段时间，通常为期较短。
After a short spell in the army, he returned to his former university.
在部队呆了一小段时间后，他又回到原来的大学。
She worked a spell as a teacher before becoming a civil servant.
在成为公务员以前她当过一阵老师。
指成长或发展的某一时期，也可指某一进程、活动等中的一个阶段。
the early stage of a kid's development
儿童成长的早期
These two teams reached the final stage of the competition.
这两支队伍进入了决赛阶段。
相关例句：
They say she died after a witch cast a spell on her.
他们说她是被一个女巫施了魔法后死的。
Now we can have a breathing spell.
现在我们可以松一口气了。
If we have a wet spell, Cecil could also run Armiger in the Derby.
如果我们遇上持续下雨，塞西尔也能让“扈从”参加德比马赛。
Even sensible Frank had fallen under her spell.
甚至连一向理智的弗兰克都被她迷住了。
Drug experts say it could spell the end of the crack epidemic.
禁毒专家说它可能会结束强效可卡因吸食泛滥的局面。
How do you spell 'potato'?
potato这个词怎么拼写？