Before Tianwen l, no country had ever tried to send an orbiter, a lander and a rover in one single expedition to Mars.

在“天问一号”之前，没有国家尝试过在单次火星探测中发射轨道飞行器、着陆器和探测器。

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To solve the problem of taxation, Dr. Quesnay and the physiocrats came up with their own original single tax (l 'impot unique) -a single tax on land.

为了解决征税问题，魁奈医生和重农学派首创了单一税制(l ' impot unique)——只对土地单独征税。

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For example, the English words "rip" and "lip" differ by a single phoneme, one corresponding to the letter "r" and the other to the letter "l."

以英语单词中的“rip”和“lip”为例，两者仅一个音素之差，即前者和字母“r”相关，后者和字母“ l ”相关。

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Quincy Jones and Lionel Richie co-produced the single, and,with a production team that included rappers Will.i.am, Kanye West and L.L.Cool J, a new music segment and lyrics were added.

VOA: standard.2010.02.18

Previously called the Course de l'Aurore, it is a single-handed race which has attracted solo rowers since it started in 1970.

BBC: Sam Goodchild prepares for Solitaire du Figaro solo race

The sharpened focus of the Securities and Exchange Commission under Chairman Mary L. Schapiro may well be the single most important shift in the corporate governance landscape this year.

FORBES: The SEC At A Crossroads

To date, most of those trained in solar have been commuting out of L.A. to the suburbs and single-owner occupied buildings have been addressed a lot faster by the industry than blocks of apartments and rental homes.

FORBES: Los Angeles Fits The Bill To Become A Solar Hotspot