an effectual complaint;
有效批评;
an effectual complaint;
有效批评;
an effectual protective against the midge.
有效防止摇蚊。
Quinine is an effectual preventive for malaria.
宁是有效
疟疾预防药。
effectual action against unemployment
反对失业有效行动
tobacco smoke is the most effectual protection against the midge.
烟草烟雾是防小蚊
最有效之
。
They are almost as expeditious and effectual as Aladdin’s lamp.
他们几乎像如意神灯那么迅速有效。
The research shows that the FA-goethite coexistensive system is quite effectual in the way of controlling the heavy metal pollution of cadmium.
因此,针铁矿-富里酸共存体系对于控制重金属镉污染具有较好效果。
a fine sense of rhythm that helped (or aided ) the student in learning music. Help, however, sometimes conveys a stronger suggestion of effectual action:
有助于(或用 aided )学生学习音乐良好
节奏感。 但是help 有时所表达
有效行动
意味更为强烈一些:
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