Effectual Demand有效需求
Effectual Reasoning效果型思维
effectual abolition有效废除
effectual call有效的呼召
effectual components有效成分
effectual countermeasures有效应对
effectual factors影响因素
an effectual行之有效的
effectual calling有效的呼召;有效的恩召;有效呼召
ADJ（形容词） If an action or plan is effectual, it succeeds in producing the results that were intended. 有效果的 [正式]
This is the only effectual way to secure our present and future happiness.
这是确保我们现在和未来幸福的唯一有效途径。