The phrase "and the first segment" is correct and usable in written English.
It can be used when referring to the initial part of a series or division in a context, such as a presentation, report, or analysis.
Example: "In this study, we will examine the data trends, and the first segment will focus on the demographic information."
Alternatives: "and the initial part" or "and the opening segment".
The ductus arteriosus is the channel in utero between the pulmonary artery and the first segment of the descending thoracic aorta.
During fetal life and immediately after birth, the ductus arteriosus connects the pulmonary artery and the first segment of the descending thoracic aorta.
Mr. Parks was born in Fort Scott, Kan.. and the first segment of the show, called "Early Life, Looking Back" consists of pictures taken mostly in 1949, which are selected memories of his childhood.
Another condition is patent ductus arteriosus, where a temporary channel that connects the pulmonary artery and the first segment of the descending thoracic aorta during fetal growth fails to close after birth, causing some mixing of oxygenated and deoxygenated blood.
Next month, another of Mr. Daugherty's cultural compilations will begin to take shape when the Detroit Symphony Orchestra, of which he is composer in residence, gives the premiere of "Rosa Parks Boulevard," a tribute to the civil-rights legend, and the first segment of "Motor City Triptych," commissioned for the city's tri centennial in 2001.
For small amplitudes of stress both measurement methods provided signals with constant amplitude (Fig. 10a and the first segment of the curve in Fig. 10b).
On February 19 , 2009 Barkley returned to TNT and spent the first segment of the NBA pregame show discussing the incident and his experiences.
And then the first segment of their old comedy was released on television.
The second (33% of the population) shows moderate preference for solar and wind energy and, as with the first segment, dislikes both nuclear and biomass.
The site size of SSB was determined by fitting the data to a two-segment line, where the x- and y-intercepts of the first segment and the slope of the second segment were constrained to zero.
I: the second segment is inverted from its original orientation and directly joined after the first segment.
