The monthly index registers zero whenever activity in those categories grows in line with historical trend.

该月度指数为零，就说明上述领域的活动增长与历史趋势一致。

youdao

The third argument (0) is the zero-based index of the directory that you want to create the group in if it doesn't exist.

第三个参数（0）是目录的基于零的索引，如果某个组不存在，则会在目录中创建这个组。

youdao

Markets seem to view that as close to zero: interest rates on index-linked bonds in the France, Germany, the UK and US are about 1 per cent.

市场似乎将这种风险视为接近于零：法国、德国、英国和美国的指数挂钩债券利率大约为1%。

youdao

The new orders index also remained below zero, at -7.8, while the shipments index was positive at 3.0.

FORBES: No Double Dip Recession, But Companies Wary

But reasonably sophisticated investors can create the same product themselves by purchasing a risk-free zero-coupon Treasury bond and call options on a stock index, such as XSP options traded on the Chicago Board Options Exchange.

FORBES: Guaranteed to Go Up