PTE Academic speaking read aloud sample paragraphs
1.Mega droughts are comparable in severity to the worst droughts of the 20th century but are of much longer duration. A mega drought in the American Southwest would impose unprecedented stress on the limited water resources of the area, making it critical to evaluate future risks not only under different climate change mitigation scenarios but also for different aspects of regional hydro climate. We find that changes in the mean hydro climate state, rather than its variability, determine mega drought risk in the American Southwest.
2.Surface active sites of crystals often govern their relevant surface chemistry, yet to monitor them in situ in real atmosphere remains a challenge. Using surface-specific sum-frequency spectroscopy, we identified the surface phonon mode associated with the active sites of under coordinated titanium ions and conjoint oxygen vacancies, and used it to monitor them on anatase (TiO2) (101) under ambient conditions.
PTE Academic Speaking read aloud sample paragraphs
3.Biosynthesis based on the reducing capacity of electro chemically active bacteria is frequently used in the reduction of metal ions into nano particles as an eco-friendly way to recycle metal resources. However, those bionanoparticles cannot be used directly as electro catalysts because of the poor conductivity of cell substrates. This problem was solved by a hydro thermal reaction, which also contributes to the heteroatom doping and alloying between Pd and Au.
4.The mechanism of unconventional superconductivity in iron-based superconductors (IBSs) is one of the most intriguing questions in current materials research. Among non-oxide IBSs, (Ba1−xKx)Fe2As2 has been intensively studied because of its high superconducting transition temperature and fascinating evolution of the superconducting gap structure from being fully isotropic at optimal doping (x ≈ 0.4) to becoming nodal at x > 0.8.
5.The tidal flow of electrically conductive oceans through the geomagnetic field results in the generation of secondary magnetic signals, which provide information on the subsurface structure. Data from the new generation of satellites were shown to contain magnetic signals due to tidal flow; however, there are no reports that these signals have been used to infer subsurface structure.
PTE Academic speaking read aloud science related sample paragraphs
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