supplement,补充，增补，-ary,形容词后缀。

1. Provide them with additional background or with supplementary information.

给他们提供额外的背景资料或补充信息。

2. Supplementary oxygen is rarely needed in pressurized aircraft.

密封的飞机内很少需要补充氧气。

3. There is a supplementary water supply in case the rain supply fails.

万一主水源断了,我们另外有供水的地方.

4. A supplementary volume has been published containing the index.

附有索引的增补卷已经出版.

5. The new students received supplementary instruction.

新生接受补课.