当未指定或未定义 importModuleDynamically 选项时

【When the importModuleDynamically option is not specified or undefined】

如果未指定此选项，或者它为 undefined，包含 import() 的代码仍然可以通过 vm API 编译，但当编译后的代码执行并实际调用 import() 时，结果将以 ERR_VM_DYNAMIC_IMPORT_CALLBACK_MISSING 拒绝。

【If this option is not specified, or if it's undefined, code containing import() can still be compiled by the vm APIs, but when the compiled code is executed and it actually calls import(), the result will reject with ERR_VM_DYNAMIC_IMPORT_CALLBACK_MISSING.】