This relieved us of part of our luggage.

这给我们减去一部分行李负担。

The advertised price was 168 dollars, but the shopkeeper knocked off the odd shillings.

广告168美元, 但店主减去了零头。

The picoammeter reads the current at the last dynode, which is equal to the anode current minus the current flowing to the previous dynode.

皮安计在最后一个倍增管读取流，此流等于阳流减去流过前一个倍增管流。