Sentence examples for origin is unclear from inspiring English sources

Leffler formulas ( Wt=frac{z+8}{2} ) For children <1 year of age Also known as the Tintinalli formula, the original origin is unclear, but became popular after the Leffler study in 1997.

"Lai lu bu ming: 'the origin is unclear.' They have to keep a low profile.

The following is said to have been recorded on Monday, and shots are audible, though their origin is unclear.

Their origin is unclear, but, according to Classical sources, they presided at all religious ceremonies, where they chanted "theogonies".

The nickname's origin is unclear but the organisation's goal gleamed bright: a revolution to let workers – in fields, farms and mines – keep what they produced.

Re "The Claim: Drinking coffee can stunt a child's growth" (Really, Oct. 18): The article says myth's origin is unclear and theorizes about caffeine, osteoporosis and the diets.

The boat's origin was unclear.

At least three loud explosions and sustained bursts of gunfire were heard in the capital, but their origin was unclear.

From the checkpoint at the entrance to Gori, explosions could be heard reverberating through the city from time to time; their origin was unclear.

The boats were carrying 129 Nigerians, 3 people from Niger, 5 from Ghana, 4 Somalis, a Liberian and a migrant whose country of origin was unclear, Ms. Boldrini said.

For the strained Si0.5Ge0.5 film, Hall mobility at room temperature was confirmed to be as high as 660 cm2 V−1 s−1 with a carrier concentration of 1.3×1018 cm−3 for n-type carrier, although the carrier origin was unclear.