https://www.fitnesstipsforlife.com/5-signs-of-weak-core-muscles.html
5 Signs of Weak Core Muscles
signs ofweak coremuscles
https://www.ofx.com/en-nz/forex-news/daily-and-weekly-market-news/2019/09/20/the-loonie-is-trading-lower-due-to-weak-core-retail-sales-and-a-strong-greenback/
The Loonie is trading lower due to weak core retail sales and a strong Greenback - OFX (NZ)
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weak coreretail salesloonietradinglower
https://doc.servo.org/serde/lib/core/sync/struct.Weak.html
Weak in serde::lib::core::sync - Rust
`Weak` is a version of `Arc` that holds a non-owning reference to the managed allocation.
weakserdelibcoresync