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Since the icy shell is geologically young and features abundant evidence of past geologic activity, it was suspected that whatever salts exist on the surface may derive from the ocean below, according to the JPL.

Since coming into operation in late 2014, the middle route of the south-to-north water diversion project has transferred 9.6 billion cubic meters of water, benefiting 53.1 million people as on Wednesday, according to the Office of the South-to-North Water Diversion Project Construction Commission of the State Council.

Since its first edition was launched in January 2016, the company's online mobile platform has attracted more than 4.1 million registered users, with transactions reaching over 4 billion yuan (2.6 million).

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Since the tightening of housing policies in 2017, financial institutions have been reducing the size of credit lines extended to real estate enterprises, to prevent excessive capital flows into the overheated industry. Their attempts may be warranted, but what also needs to be borne in mind now is that property developers are over-pressured against a background of the ongoing pandemic.

Since hitting the market in 2016, sales for Geely's Lynk & Co brand have exceeded 300,000. Its 01 plug-in hybrid model has been mooted for launch in Europe in the second half of the year.

Since then, government officials and training school teachers have spared no efforts to encourage local women to come outside of their homes and develop skills to find jobs in other cities.

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Since the start of this year, Zhao's observatory has reported many asteroids making close passes with Earth. It finds another asteroid is expected to approach Earth on May 1, at a distance of 7.05 million km above the surface.

Since Jan 1, 2015, Afghan security forces have assumed full security charge from NATO and US forces.

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Since January 2019, more than 450 different training opportunities have been provided by the Chinese embassy, said Li Jiang, commercial counselor of the Chinese Embassy in Liberia.

Since then, regulators and external auditors have exerted their functions more effectively and helped improve Wall Street investors' confidence in Chinese firms. IPOs of Chinese firms like Alibaba and JD were welcomed by the US market.