The phrase "a very weak level" is correct and usable in written English.
It can be used to describe a low degree or intensity of something, such as performance, quality, or strength.
Example: "The team's performance was at a very weak level, which ultimately led to their defeat in the tournament."
Alternatives: "a low level" or "an inadequate level".
A "moderate," "weak," or "very weak" level of proof resulted in a "conditional" recommendation ("should probably be done", "should probably not be done…").
A "moderate", "weak", or "very weak" level of proof led to the formulation of an "optional" recommendation (should probably be performed, should probably not be performed, etc).
A "moderate", "weak", or "very weak" level of proof led to the formulation of an "optional" recommendation (should probably be performed, should probably not be performed, etc).
A "moderate," "weak," or "very weak" level of proof led to the drawing up of an "optional" recommendation (should probably be done, should probably not be done …).
A "moderate," "weak," or "very weak" level of evidence (Grade 2+ or 2−) led to the drawing up of an "optional" recommendation (i.e., should probably be done, should probably not be done).
Descriptively, one represents no apparent staining or very weak level of staining, two represents a faint or focal, questionably present stain, three represents a stain of convincing intensity in a minority of cells, and four represents a stain of convincing intensity in a majority of cells.
Descriptively, 1 represents no apparent staining or very weak level of staining, 2 represents a faint or focal, questionably present stain, 3 represents a stain of convincing intensity in a minority of cells, and 4 represents a stain of convincing intensity in a majority of cells.
Several families such as IS4 for example display extremely elevated levels of divergence, with many emerging clusters that show very weak level of sequence conservation with the other members of the family [ 12].
We found that the expression pattern of a pWUS GUS reporter in the wus-1 mutant showed a patchy pattern at very weak levels compared to the wild type (Fig. 5B).
