你必须确定你梦想中的工作。
你必须确定在早餐里摄取了所有必须的营养物质。
Make sure you have all the required nutrients from your breakfast.
你必须确定哪种接触属性定义或接触单元集改变了。
You must identify which contact property definition or contact element set is being changed.
Another part of the problem of learning language is you have to figure out what the boundaries are between the words.
学习语言的另一个问题是,你必须得确定单词之间的界线是什么
You have to use sound signals to figure out the boundaries between the words.
你必须要用声音信号,来确定单词之间的界线
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