“应罚款的”可以翻译为“liable to a fine” 或者 “subject to a fine” 。
“liable to a fine” 强调有责任或可能性要接受罚款处罚,例如:Those who violate the traffic rules are liable to a fine.(违反交通规则的人应受罚款处罚 。 )
“subject to a fine” 同样表达面临罚款的可能,常用于说明在某种情况下会受到罚款这一后果,例如:Companies that fail to comply with environmental regulations are subject to a fine.(未能遵守环境法规的公司应受罚款处罚。 )