无主句是指在直接成分中无主语的句子。
Sentences with no subject are these that have no subject in immediate components.
应该注意对这种化学品对环境影响的研究。[原句的主语和谓语合译成汉语无主句的谓语。]。
Attention should be paid to the study of the chemical's effects on the environment.
无主语分句在书面英语中出现的频率很高。
Subjectless clauses appear in written English quite frequently.
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