有效的

• When does the new system become effective?

  新制度何时生效？

• Advertising is often the most effective method of promotion.

  做广告往往是最有效的推销方法。

• Schoolgirls [play volleyball] in Xanthi.

  女学生正在打排球。

• The company's assets were undervalued in its balance sheet.

  该公司资产在资产负债表中估价过低。

• We found a simple and effective way of classifying the data.

  我们找到了一个简单有效的方法，用以把数据分级。

• The drug is effective against a range of bacteria.

  这种药品对一系列细菌有效。

生效的，起作用的

• A bill passed by congress becomes effective as soon as the President signs it.

  国会通过的法案一经总统签署立即生效。

• The law is effective immediately.

  这项法律立即生效。

给人深刻印象的；有力的

• That's rather an effective use of color.

  那样使用颜色效果甚佳。

实际的；事实上的

• Her brother is the king but she is the effective ruler.

  她的兄弟是国王， 但她才是实际的主宰者。

• Last year saw a decline in the effective demand for steel.

  去年，钢铁的实际需求下降了。

有战斗力的