low course的用法和樣例：
例句
- Beyond a group of low loess hills, clouds obscured a line of snowy peaks.
望著(zhù)湟水下游的彎曲長(cháng)灘，幾道黃土淺山的背后，云霧隱隱罩著(zhù)一線(xiàn)銀霞般的雪山。 - Egina Oasis in the low reaches of Heihe River is extremely arid, Heihe River is the only source of water.
黑河下游的額濟納綠洲極度乾旱，黑河是其唯一的水源。
