研究人员非常焦虑，生怕在实验过程中污染样本。
The researchers were anxious not to contaminate the samples during the experiment.
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were英 /wɜː/|美 /wər/
anxious英 /ˈæŋkʃəs/|美 /ˈæŋkʃəs/
not英 /nɒt/|美 /nɑt/
to英 /tuː/|美 /tu/|英 /tə/|美 /tə/
解释
were anxious + not + to contaminate：be 动词 + 表达焦虑/急切的形容词 anxious + not to（否定不定式），表示主语极度在意避免某事发生。
The researchers were anxious not to contaminate the samples during the experiment.
were anxious + not + to contaminate：be 动词 + 表达焦虑/急切的形容词 anxious + not to（否定不定式），表示主语极度在意避免某事发生。