The phrase "a weak part" is correct and usable in written English.
It can be used to describe a section of something, such as an argument, story, or physical object, that lacks strength or effectiveness.
Example: "In the presentation, I noticed that there was a weak part in the argument that could be improved for better clarity."
Alternatives: "a vulnerable section" or "a flawed component".
Mackie, who struggles both with a weak part and his Nigerian accent, can offer no foil.
"Maybe it is reflective of baseball's drug policy; as much as they beat their chest, this sounds like a weak part".
On the other hand, the microhardness and SEM characterization results indicate that the interface transition zone (ITZ) was a weak part in both RAC and NAC, and the ITZ in NAC obviously deteriorated faster than that of RAC.
Similar conclusions can be drawn for the SCF and SCE indices of Cases A and C and for the indices of Cases B and D. These results indicate that, compared with L28, L7 is a weak part from the perspective of TC.
The results showed that a reinforcement of the interfacial transition zone (ITZ), a weak part of the concrete, by coating the surface of the original coarse aggregate with surface-modification material, can help suppress the occurrence of microcracks and improve the mechanical performance of the aggregate.
For the time being the aspect of patient orientation, one characteristic of the responsiveness of a health system [ 45], remains a weak part.
By his own admission, scoring was a weaker part of his game in his first few seasons at Arsenal; wasteful finishing also being symptomatic of the larger problem surrounding Arsenal in the 2005 06 and 2006 07 seasons.
A particularly weak part of the skull that is vulnerable to damage causing extradural haematoma is the pterion, deep in which lies the middle meningeal artery, which is easily damaged in fractures of the pterion.
As is the case in other low-income countries, supply chain management is an especially weak part of the national health system.
Are there any weak parts in your frame?
Tenors are often the weak part of a chorus, but here they may have been the strongest.
