托福词汇列表

[338-210] null

adj.无效的(invalid, void)

[338-210] valid

adj.有效的(soundly based, acceptable)

【例】 A traveler's passport is valid within 6 months.

[338-210] invalid

adj.无效的(void)

[338-210] effect

n.效果；印象(result; impression)

【例】 What will the effect be on the twins if they are separated?

[338-210] effective

adj.有效的；有影响的(valid; resultful)

【例】 The effective politician cut waste from the budget.

[338-210] efficient

adj.有效率的(effective, competent)

【例】 The financial analyst found efficient ways for the company to save money.

[339-210] outcome

n.后果；成果(result, consequence)

[339-210] impotence

n.无效