enclosures的例句（enclosures在句子中的用法）

• Therefore, it is frequently necessary to control certain aspects of the environment in such large enclosures. 因此常常需要控制如此大范围环境的某些方面.
• The analyzer unit consists of two enclosures. 分析单元由二部分组成.
• I received a letter with three enclosures. 我收到一封有三份附件的信.