The supervisor of the laboratory is beginning to get headaches and dizzy spells because she says it's dangerous to breathe some of the chemical smoke there.
出自-2011年6月听力原文
英语六级真题
Many different kinds of plants have developed tactics to weather dry spells.
2018年6月六级真题（第一套）阅读 Section B
柯林斯高阶英汉双解学习词典释义
VERB
拼写;拼读
When you spell a word, you write or speak each letter in the word in the correct order.