提示：点击例句中的单词，就可以看到词义解释

Approximately 20 million people are currently infected with this virus .

目前大约有2000万人感染了此种病毒。

Approximately 300 new firewalls will also be installed .

该网站还将安装约300个新的防火墙。

Allow approximately 15 minutes for it to completely dry .

等个大概15分钟，让它完全干透。

The grove contains approximately 400 pine trees with bent trunks .

这里长着近400棵树干弯曲的松树。

Within approximately two minutes , he had arrested the bank robber .

不到两分钟，他就把劫匪缉拿归案。