Wording fix

Author: JiaweiZhuang

Chapter02_NC_and_bpch_diagnostics.ipynb

@@ -31,7 +31,7 @@
     "import xarray as xr\n",
     "import xbpch\n",
     "\n",
-    "import warnings; warnings.filterwarnings(\"ignore\")  # hide some warnings for xbpch\n",
+    "import warnings; warnings.filterwarnings(\"ignore\")  # hide some xbpch warnings\n",
     "\n",
     "from gamap_colormap import WhGrYlRd"
    ]
@@ -122,7 +122,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Each variable contains 3 time slices, since I run the model for 1 hour and the output frequency is 20min."
+    "Each variable contains 3 time slices, since I run the model for 1 hour and a time slice is written out every 20min."
    ]
   },
   {
@@ -246,7 +246,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "ND49 (timeseries) is no wonder the most-used BPCH diagnostics. To replicate the same configuration as the NC diag module above, my `input.geos` file would look like:\n",
+    "ND49 (timeseries) is no doubt the most-used BPCH diagnostics. To replicate the same configuration as the NC diag module above, my `input.geos` file would look like:\n",
     "\n",
     "```\n",
     "%%% ND49 MENU %%%       :\n",