The phrase "approaches still require" is correct and usable in written English.
It can be used when discussing the necessity of certain methods or strategies in a given context, indicating that they are still needed despite other changes or developments.
Example: "Even with the advancements in technology, traditional approaches still require careful consideration to ensure effectiveness."
Alternatives: "methods still necessitate" or "strategies still demand".
Both approaches still require further costing and engineering development.
However, many of these alternative approaches still require validation and/or calibration with regard to their predictive power and relevance for living organisms.
However, these approaches still require time-consuming procedures including transfection and drug selection, or costly synthetic molecules.
It is important to note, however, that candidate genes identified from these unbiased functional approaches still require extensive validation before they can be considered as putative biomarkers.
Some facets of this methodological approach still require further consideration, principally an enhanced integration of climatology, geography and ecology into models considering evolution of the environment, some aspects of the interface between the geosphere and biosphere, and an accurate quantification of environmental change processes and rates.
Although it was demonstrated that the basic method developed here (Fig. 2a) was applicable for the isolation of yeast cells with mating ability from common sake yeast strains, due to the requirement for the repeated exchange of plasmids, this approach still required multiple steps to perform the final hybridization and isolated a- or α-type derivatives.
The methods for solving vehicle pavement interaction problem can be classified into analytic approach and numerical application, though the implementation of analytic approach still requires numerical computation.
However this approach still requires the prosecuting authority to establish this point beyond reasonable doubt before an offence is committed and potentially remains a barrier to prosecution.
Although this approach still requires software engineering skills, it tackles the need of building VIDLs allowing both visual models for human-interpretation purposes (explicit designs, communication, thinking, etc).
However, we note that, even when scalar quantizers are used, achieving good performance with this approach still requires the use of a subsequent block-based SW coding method (e.g., Turbo codes or LDPC codes).
However, this approach still requires considering all possible symbol detection cases at the relays as well as the destination which increases the complexity of the receiver exponentially with the modulation order and the number of users.
