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- The illuminance degree in the illuminant circuit is not raised when the voltage is higher than the limited voltage of fluorescent lamp, which leads to the ineffective power of the extra voltage. 结果表明，在以日光灯为负载的照明电路中，当电网电压超过日光灯额定电压时，只会造成超额电压部分的无效功耗，并不增加照度；
- My extra earnings came in very handy. 我的额外收入可备我不时之需。
- This extra strong glue should do the job nicely. 这种超强度胶应该管用。
- She decided to rent out a room to get extra income. 她为获得额外收入决定租出一个房间。
- She's always saddling extra duties on me. 她总是把额外责任加到我身上。
- The brackets want an extra screw. 托架需要再加一个螺钉。
- He paid the extra cost without a murmur. 他付了额外的费用而毫无怨言。
- Its voltage has not been exceeded. 它的电压没有超过。
- This dress is of extra fine quality. 这件衣服的质地特别好。
- Our immediate requirement is extra staff. 我们亟需增加工作人员。
- Extra work kept him (late) at the office. 他因有额外的工作，(很晚)仍留在办公室里。
- She decide to rent out a room to get extra income. 她为获得额外收入决定租出一个房间。
- The seat back is raked for extra comfort. 这椅背向後倾斜更加舒适。
- I have to be at the office extra early tomorrow. 我明天必须很早就到达办公室。
- He received triple pay for his extra work. 他因超额工作得到三倍的报酬。
- They announced that she would give one extra song. 他们宣布说她将再唱一首歌。
- Put an extra woolly on when you go out. 出去时多加件毛衣。
- I don't suppose they wanted any extra help. 我想他们不需要额外帮助。
- The farmer hired extra workers for the harvest. 农人为收割额外雇了工人。
- The extra two-day holiday was a real bonus. 外加的两天假期真是额外之所得。
