Location of SBS 0335−052 (filled circle) in the diagram of O/Fe abundance ratio vs. iron abundance. Here [X] ≡ log X − log X_☉. For comparison, we also show the data for low‐metallicity BCGs (Thuan et al. 1995, Izotov et al. 1996b; open circles) and for disk and halo stars (dots) from Edvardsson et al. (1993), Barbuy (1988), and Barbuy & Erdelyi‐Mendes (1989). The solid line is the [O/Fe] vs. [Fe/H] predicted by the chemical evolution model for the Galaxy, while dashed lines show chemical evolution model predictions with iron yields 2 times larger and lower than that for the solid line (Timmes et al. 1995). While there is excellent agreement between the BCG data and that for Galactic halo stars, SBS 0335−052 is a significantly deviant point, with [O/Fe] close to solar.